79670042 has 4 divisors (see below), whose sum is σ = 119505066. Its totient is φ = 39835020.

The previous prime is 79670039. The next prime is 79670051. The reversal of 79670042 is 24007697.

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., 52432081 + 27237961 = 7241^2 + 5219^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79669984 and 79670011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19917509 + ... + 19917512.

Almost surely, 2^79670042 is an apocalyptic number.

79670042 is a deficient number, since it is larger than the sum of its proper divisors (39835024).

79670042 is a wasteful number, since it uses less digits than its factorization.

79670042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39835023.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 79670042 is about 8925.8076385277. The cubic root of 79670042 is about 430.2937275622.

The spelling of 79670042 in words is "seventy-nine million, six hundred seventy thousand, forty-two".