79873155 has 16 divisors (see below), whose sum is σ = 141996960. Its totient is φ = 42598944.

The previous prime is 79873147. The next prime is 79873159. The reversal of 79873155 is 55137897.

It is not a de Polignac number, because 79873155 - 2³ = 79873147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 79873155.

It is not an unprimeable number, because it can be changed into a prime (79873159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295692 + ... + 295961.

It is an arithmetic number, because the mean of its divisors is an integer number (8874810).

Almost surely, 2^79873155 is an apocalyptic number.

79873155 is a deficient number, since it is larger than the sum of its proper divisors (62123805).

79873155 is a wasteful number, since it uses less digits than its factorization.

79873155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591667 (or 591661 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 79873155 is about 8937.1782459566. The cubic root of 79873155 is about 430.6590848152.

The spelling of 79873155 in words is "seventy-nine million, eight hundred seventy-three thousand, one hundred fifty-five".