78579725 has 24 divisors (see below), whose sum is σ = 117224640. Its totient is φ = 51045120.

The previous prime is 78579719. The next prime is 78579803. The reversal of 78579725 is 52797587.

It is not a de Polignac number, because 78579725 - 2¹⁸ = 78317581 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8492 + ... + 15141.

It is an arithmetic number, because the mean of its divisors is an integer number (4884360).

Almost surely, 2^78579725 is an apocalyptic number.

It is an amenable number.

78579725 is a deficient number, since it is larger than the sum of its proper divisors (38644915).

78579725 is a wasteful number, since it uses less digits than its factorization.

78579725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23669 (or 23664 counting only the distinct ones).

The product of its digits is 1234800, while the sum is 50.

The square root of 78579725 is about 8864.5205736125. The cubic root of 78579725 is about 428.3217894039.

The spelling of 78579725 in words is "seventy-eight million, five hundred seventy-nine thousand, seven hundred twenty-five".