78972975 has 60 divisors (see below), whose sum is σ = 148989720. Its totient is φ = 41342400.

The previous prime is 78972941. The next prime is 78972991. The reversal of 78972975 is 57927987.

It is a de Polignac number, because none of the positive numbers 2^k-78972975 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 119145 + ... + 119805.

It is an arithmetic number, because the mean of its divisors is an integer number (2483162).

Almost surely, 2^78972975 is an apocalyptic number.

78972975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78972975 is a deficient number, since it is larger than the sum of its proper divisors (70016745).

78972975 is a wasteful number, since it uses less digits than its factorization.

78972975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 728 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 78972975 is about 8886.6740122500. The cubic root of 78972975 is about 429.0351088681.

The spelling of 78972975 in words is "seventy-eight million, nine hundred seventy-two thousand, nine hundred seventy-five".