79978151 has 16 divisors (see below), whose sum is σ = 89717760. Its totient is φ = 70667520.

The previous prime is 79978141. The next prime is 79978169. The reversal of 79978151 is 15187997.

It is not a de Polignac number, because 79978151 - 2²² = 75783847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79978096 and 79978105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79978111) 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, 166730 + ... + 167208.

It is an arithmetic number, because the mean of its divisors is an integer number (5607360).

Almost surely, 2^79978151 is an apocalyptic number.

79978151 is a deficient number, since it is larger than the sum of its proper divisors (9739609).

79978151 is a wasteful number, since it uses less digits than its factorization.

79978151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its digits is 158760, while the sum is 47.

The square root of 79978151 is about 8943.0504303621. The cubic root of 79978151 is about 430.8477075651.

The spelling of 79978151 in words is "seventy-nine million, nine hundred seventy-eight thousand, one hundred fifty-one".