649642925 has 12 divisors (see below), whose sum is σ = 824292480. Its totient is φ = 507627120.

The previous prime is 649642919. The next prime is 649642937. The reversal of 649642925 is 529246946.

It is not a de Polignac number, because 649642925 - 2²⁶ = 582534061 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 649642925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301085 + ... + 303234.

It is an arithmetic number, because the mean of its divisors is an integer number (68691040).

Almost surely, 2^649642925 is an apocalyptic number.

It is an amenable number.

649642925 is a deficient number, since it is larger than the sum of its proper divisors (174649555).

649642925 is a wasteful number, since it uses less digits than its factorization.

649642925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604372 (or 604367 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The square root of 649642925 is about 25488.0937890616. The cubic root of 649642925 is about 866.0804545790.

The spelling of 649642925 in words is "six hundred forty-nine million, six hundred forty-two thousand, nine hundred twenty-five".