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9986204761 = 13276872
BaseRepresentation
bin10010100110011100…
…10110010001011001
3221202221210202121121
421103032112101121
5130422432023021
64330531005241
7502316224411
oct112316262131
927687722547
109986204761
114264a52495
121b28439821
13c31b9a300
146aa3b1641
153d6a85741
hex253396459

9986204761 has 9 divisors (see below), whose sum is σ = 10814871231. Its totient is φ = 9216835992.

The previous prime is 9986204759. The next prime is 9986204773. The reversal of 9986204761 is 1674026899.

It is a happy number.

The square root of 9986204761 is 99931.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1477249225 + 8508955536 = 38435^2 + 92244^2 .

It is not a de Polignac number, because 9986204761 - 21 = 9986204759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9986204699 and 9986204708.

It is not an unprimeable number, because it can be changed into a prime (9986204731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1295260 + ... + 1302946.

It is an arithmetic number, because the mean of its divisors is an integer number (1201652359).

Almost surely, 29986204761 is an apocalyptic number.

9986204761 is the 99931-st square number.

9986204761 is the 49966-th centered octagonal number.

It is an amenable number.

9986204761 is a deficient number, since it is larger than the sum of its proper divisors (828666470).

9986204761 is an frugal number, since it uses more digits than its factorization.

9986204761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15400 (or 7700 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The cubic root of 9986204761 is about 2153.4435360699.

The spelling of 9986204761 in words is "nine billion, nine hundred eighty-six million, two hundred four thousand, seven hundred sixty-one".

Divisors: 1 13 169 7687 99931 1299103 59089969 768169597 9986204761