79788975 has 48 divisors (see below), whose sum is σ = 151537920. Its totient is φ = 36288000.

The previous prime is 79788971. The next prime is 79788997. The reversal of 79788975 is 57988797.

It is not a de Polignac number, because 79788975 - 2² = 79788971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79788971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198775 + ... + 199175.

It is an arithmetic number, because the mean of its divisors is an integer number (3157040).

Almost surely, 2^79788975 is an apocalyptic number.

79788975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79788975 is a deficient number, since it is larger than the sum of its proper divisors (71748945).

79788975 is a wasteful number, since it uses less digits than its factorization.

79788975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 795 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 60.

The square root of 79788975 is about 8932.4674642564. The cubic root of 79788975 is about 430.5077380742.

The spelling of 79788975 in words is "seventy-nine million, seven hundred eighty-eight thousand, nine hundred seventy-five".