79730842 has 4 divisors (see below), whose sum is σ = 119596266. Its totient is φ = 39865420.

The previous prime is 79730837. The next prime is 79730851. The reversal of 79730842 is 24803797.

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., 75325041 + 4405801 = 8679^2 + 2099^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 79730795 and 79730804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19932709 + ... + 19932712.

Almost surely, 2^79730842 is an apocalyptic number.

79730842 is a deficient number, since it is larger than the sum of its proper divisors (39865424).

79730842 is a wasteful number, since it uses less digits than its factorization.

79730842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39865423.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 79730842 is about 8929.2128432466. The cubic root of 79730842 is about 430.4031589356.

The spelling of 79730842 in words is "seventy-nine million, seven hundred thirty thousand, eight hundred forty-two".