79877155 has 8 divisors (see below), whose sum is σ = 96355584. Its totient is φ = 63566400.

The previous prime is 79877153. The next prime is 79877167. The reversal of 79877155 is 55177897.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79877155 - 2¹ = 79877153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79877099 and 79877108.

It is not an unprimeable number, because it can be changed into a prime (79877153) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 40866 + ... + 42775.

It is an arithmetic number, because the mean of its divisors is an integer number (12044448).

Almost surely, 2^79877155 is an apocalyptic number.

79877155 is a deficient number, since it is larger than the sum of its proper divisors (16478429).

79877155 is a wasteful number, since it uses less digits than its factorization.

79877155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83837.

The product of its digits is 617400, while the sum is 49.

The square root of 79877155 is about 8937.4020274350. The cubic root of 79877155 is about 430.6662737453. Note that the first 3 decimals are identical.

The spelling of 79877155 in words is "seventy-nine million, eight hundred seventy-seven thousand, one hundred fifty-five".