79191938 has 12 divisors (see below), whose sum is σ = 138182022. Its totient is φ = 33939360.

The previous prime is 79191929. The next prime is 79191941. The reversal of 79191938 is 83919197.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46963609 + 32228329 = 6853^2 + 5677^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79191892 and 79191901.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 403943 + ... + 404138.

Almost surely, 2^79191938 is an apocalyptic number.

79191938 is a deficient number, since it is larger than the sum of its proper divisors (58990084).

79191938 is a wasteful number, since it uses less digits than its factorization.

79191938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808097 (or 808090 counting only the distinct ones).

The product of its digits is 122472, while the sum is 47.

The square root of 79191938 is about 8898.9852230465. The cubic root of 79191938 is about 429.4312617929.

It can be divided in two parts, 791 and 91938, that added together give a palindrome (92729).

The spelling of 79191938 in words is "seventy-nine million, one hundred ninety-one thousand, nine hundred thirty-eight".