79099809238 has 4 divisors (see below), whose sum is σ = 118649713860. Its totient is φ = 39549904618.

The previous prime is 79099809233. The next prime is 79099809287. The reversal of 79099809238 is 83290899097.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 79099809238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79099809233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19774952308 + ... + 19774952311.

It is an arithmetic number, because the mean of its divisors is an integer number (29662428465).

Almost surely, 2^79099809238 is an apocalyptic number.

79099809238 is a deficient number, since it is larger than the sum of its proper divisors (39549904622).

79099809238 is a wasteful number, since it uses less digits than its factorization.

79099809238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39549904621.

The product of its (nonzero) digits is 17635968, while the sum is 64.

The spelling of 79099809238 in words is "seventy-nine billion, ninety-nine million, eight hundred nine thousand, two hundred thirty-eight".