79938861 has 8 divisors (see below), whose sum is σ = 106634880. Its totient is φ = 53267712.

The previous prime is 79938851. The next prime is 79938883. The reversal of 79938861 is 16883997.

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

It is not a de Polignac number, because 79938861 - 2⁶ = 79938797 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79938851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3420 + ... + 13098.

It is an arithmetic number, because the mean of its divisors is an integer number (13329360).

Almost surely, 2^79938861 is an apocalyptic number.

It is an amenable number.

79938861 is a deficient number, since it is larger than the sum of its proper divisors (26696019).

79938861 is a wasteful number, since it uses less digits than its factorization.

79938861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12435.

The product of its digits is 653184, while the sum is 51.

The square root of 79938861 is about 8940.8534827498. The cubic root of 79938861 is about 430.7771433798. Note that the first 3 decimals are identical.

The spelling of 79938861 in words is "seventy-nine million, nine hundred thirty-eight thousand, eight hundred sixty-one".