865925613 has 16 divisors (see below), whose sum is σ = 1466117760. Its totient is φ = 494814528.

The previous prime is 865925507. The next prime is 865925623. The reversal of 865925613 is 316529568.

865925613 is a `hidden beast` number, since 8 + 6 + 5 + 9 + 25 + 613 = 666.

It is not a de Polignac number, because 865925613 - 2¹⁰ = 865924589 is a prime.

It is a super-3 number, since 3×865925613³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865925623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2290620 + ... + 2290997.

It is an arithmetic number, because the mean of its divisors is an integer number (91632360).

Almost surely, 2^865925613 is an apocalyptic number.

It is an amenable number.

865925613 is a deficient number, since it is larger than the sum of its proper divisors (600192147).

865925613 is a wasteful number, since it uses less digits than its factorization.

865925613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581633 (or 4581627 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 865925613 is about 29426.6140254022. The cubic root of 865925613 is about 953.1476802673.

The spelling of 865925613 in words is "eight hundred sixty-five million, nine hundred twenty-five thousand, six hundred thirteen".