79037138 has 4 divisors (see below), whose sum is σ = 118555710. Its totient is φ = 39518568.

The previous prime is 79037111. The next prime is 79037141. The reversal of 79037138 is 83173097.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83173097 = 7 ⋅11881871.

It can be written as a sum of positive squares in only one way, i.e., 78623689 + 413449 = 8867^2 + 643^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19759283 + ... + 19759286.

Almost surely, 2^79037138 is an apocalyptic number.

79037138 is a deficient number, since it is larger than the sum of its proper divisors (39518572).

79037138 is a wasteful number, since it uses less digits than its factorization.

79037138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39518571.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 79037138 is about 8890.2833475655. The cubic root of 79037138 is about 429.1512698197.

The spelling of 79037138 in words is "seventy-nine million, thirty-seven thousand, one hundred thirty-eight".