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9387090769 = 72138412
BaseRepresentation
bin10001011111000001…
…11010001101010001
3220020012110121201111
420233200322031101
5123211043401034
64151245533321
7451422645400
oct105740721521
926205417644
109387090769
113a8784a261
12199b874241
13b67a21aa4
146509b9637
1539e190364
hex22f83a351

9387090769 has 9 divisors (see below), whose sum is σ = 10920466011. Its totient is φ = 8045496480.

The previous prime is 9387090767. The next prime is 9387090781. The reversal of 9387090769 is 9670907839.

The square root of 9387090769 is 96887.

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., 2974284369 + 6412806400 = 54537^2 + 80080^2 .

It is not a de Polignac number, because 9387090769 - 21 = 9387090767 is a prime.

It is a super-2 number, since 2×93870907692 (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9387090761) 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, 671289 + ... + 685129.

Almost surely, 29387090769 is an apocalyptic number.

9387090769 is the 96887-th square number.

9387090769 is the 48444-th centered octagonal number.

It is an amenable number.

9387090769 is a deficient number, since it is larger than the sum of its proper divisors (1533375242).

9387090769 is an frugal number, since it uses more digits than its factorization.

9387090769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27696 (or 13848 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 58.

The cubic root of 9387090769 is about 2109.4877404731.

The spelling of 9387090769 in words is "nine billion, three hundred eighty-seven million, ninety thousand, seven hundred sixty-nine".

Divisors: 1 7 49 13841 96887 678209 191573281 1341012967 9387090769