64925869 has 4 divisors (see below), whose sum is σ = 68343040. Its totient is φ = 61508700.

The previous prime is 64925863. The next prime is 64925891. The reversal of 64925869 is 96852946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64925869 - 2¹¹ = 64923821 is a prime.

It is a super-2 number, since 2×64925869² = 8430736930810322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64925863) 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, 1708557 + ... + 1708594.

It is an arithmetic number, because the mean of its divisors is an integer number (17085760).

Almost surely, 2^64925869 is an apocalyptic number.

It is an amenable number.

64925869 is a deficient number, since it is larger than the sum of its proper divisors (3417171).

64925869 is a wasteful number, since it uses less digits than its factorization.

64925869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417170.

The product of its digits is 933120, while the sum is 49.

The square root of 64925869 is about 8057.6590272858. The cubic root of 64925869 is about 401.9196662161.

The spelling of 64925869 in words is "sixty-four million, nine hundred twenty-five thousand, eight hundred sixty-nine".