78612925 has 12 divisors (see below), whose sum is σ = 97595316. Its totient is φ = 62816000.

The previous prime is 78612893. The next prime is 78612943. The reversal of 78612925 is 52921687.

It can be written as a sum of positive squares in 6 ways, for example, as 3218436 + 75394489 = 1794^2 + 8683^2 .

It is not a de Polignac number, because 78612925 - 2⁵ = 78612893 is a prime.

It is a Duffinian number.

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, 31317 + ... + 33733.

It is an arithmetic number, because the mean of its divisors is an integer number (8132943).

Almost surely, 2^78612925 is an apocalyptic number.

It is an amenable number.

78612925 is a deficient number, since it is larger than the sum of its proper divisors (18982391).

78612925 is a wasteful number, since it uses less digits than its factorization.

78612925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728 (or 3723 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 78612925 is about 8866.3930095614. The cubic root of 78612925 is about 428.3821030161.

The spelling of 78612925 in words is "seventy-eight million, six hundred twelve thousand, nine hundred twenty-five".