78957965 has 16 divisors (see below), whose sum is σ = 99792000. Its totient is φ = 59856192.

The previous prime is 78957943. The next prime is 78958031. The reversal of 78957965 is 56975987.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78957965 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78957965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9386 + ... + 15684.

It is an arithmetic number, because the mean of its divisors is an integer number (6237000).

Almost surely, 2^78957965 is an apocalyptic number.

It is an amenable number.

78957965 is a deficient number, since it is larger than the sum of its proper divisors (20834035).

78957965 is a wasteful number, since it uses less digits than its factorization.

78957965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436.

The product of its digits is 4762800, while the sum is 56.

The square root of 78957965 is about 8885.8294491848. The cubic root of 78957965 is about 429.0079256237.

The spelling of 78957965 in words is "seventy-eight million, nine hundred fifty-seven thousand, nine hundred sixty-five".