79791938 has 4 divisors (see below), whose sum is σ = 119687910. Its totient is φ = 39895968.

The previous prime is 79791913. The next prime is 79791973. The reversal of 79791938 is 83919797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 79263409 + 528529 = 8903^2 + 727^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 79791938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19947983 + ... + 19947986.

Almost surely, 2^79791938 is an apocalyptic number.

79791938 is a deficient number, since it is larger than the sum of its proper divisors (39895972).

79791938 is a wasteful number, since it uses less digits than its factorization.

79791938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39895971.

The product of its digits is 857304, while the sum is 53.

The square root of 79791938 is about 8932.6333183446. The cubic root of 79791938 is about 430.5130670420.

The spelling of 79791938 in words is "seventy-nine million, seven hundred ninety-one thousand, nine hundred thirty-eight".