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2690634817 = 13206971909
BaseRepresentation
bin1010000001011111…
…1101010001000001
320221111220102002101
42200113331101001
521002300303232
61122553350401
7123451006243
oct24027752101
96844812071
102690634817
11116087a842
12631108401
1333b587b10
141b74b6093
1510b3351e7
hexa05fd441

2690634817 has 4 divisors (see below), whose sum is σ = 2897606740. Its totient is φ = 2483662896.

The previous prime is 2690634769. The next prime is 2690634833. The reversal of 2690634817 is 7184360962.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1776116736 + 914518081 = 42144^2 + 30241^2 .

It is a de Polignac number, because none of the positive numbers 2k-2690634817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2690634847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103485942 + ... + 103485967.

It is an arithmetic number, because the mean of its divisors is an integer number (724401685).

Almost surely, 22690634817 is an apocalyptic number.

It is an amenable number.

2690634817 is a deficient number, since it is larger than the sum of its proper divisors (206971923).

2690634817 is a wasteful number, since it uses less digits than its factorization.

2690634817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206971922.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 2690634817 is about 51871.3294315848. The cubic root of 2690634817 is about 1390.8648099005.

The spelling of 2690634817 in words is "two billion, six hundred ninety million, six hundred thirty-four thousand, eight hundred seventeen".

Divisors: 1 13 206971909 2690634817