79636394 has 4 divisors (see below), whose sum is σ = 119454594. Its totient is φ = 39818196.

The previous prime is 79636393. The next prime is 79636409. The reversal of 79636394 is 49363697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49363697 = 167 ⋅295591.

It can be written as a sum of positive squares in only one way, i.e., 47430769 + 32205625 = 6887^2 + 5675^2 .

It is not an unprimeable number, because it can be changed into a prime (79636393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19909097 + ... + 19909100.

Almost surely, 2^79636394 is an apocalyptic number.

79636394 is a deficient number, since it is larger than the sum of its proper divisors (39818200).

79636394 is a wasteful number, since it uses less digits than its factorization.

79636394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39818199.

The product of its digits is 734832, while the sum is 47.

The square root of 79636394 is about 8923.9225680191. The cubic root of 79636394 is about 430.2331420031.

The spelling of 79636394 in words is "seventy-nine million, six hundred thirty-six thousand, three hundred ninety-four".