79813994 has 8 divisors (see below), whose sum is σ = 128930340. Its totient is φ = 36837216.

The previous prime is 79813973. The next prime is 79813999. The reversal of 79813994 is 49931897.

It can be written as a sum of positive squares in 2 ways, for example, as 69973225 + 9840769 = 8365^2 + 3137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (79813999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534859 + ... + 1534910.

Almost surely, 2^79813994 is an apocalyptic number.

79813994 is a deficient number, since it is larger than the sum of its proper divisors (49116346).

79813994 is a wasteful number, since it uses less digits than its factorization.

79813994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069784.

The product of its digits is 489888, while the sum is 50.

The square root of 79813994 is about 8933.8678073945. The cubic root of 79813994 is about 430.5527307042.

The spelling of 79813994 in words is "seventy-nine million, eight hundred thirteen thousand, nine hundred ninety-four".