79978959 has 6 divisors (see below), whose sum is σ = 115525176. Its totient is φ = 53319300.

The previous prime is 79978957. The next prime is 79978963. The reversal of 79978959 is 95987997.

It is not a de Polignac number, because 79978959 - 2¹ = 79978957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79978896 and 79978905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79978957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4443267 + ... + 4443284.

It is an arithmetic number, because the mean of its divisors is an integer number (19254196).

Almost surely, 2^79978959 is an apocalyptic number.

79978959 is a deficient number, since it is larger than the sum of its proper divisors (35546217).

79978959 is a wasteful number, since it uses less digits than its factorization.

79978959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8886557 (or 8886554 counting only the distinct ones).

The product of its digits is 12859560, while the sum is 63.

The square root of 79978959 is about 8943.0956049905. The cubic root of 79978959 is about 430.8491584771.

The spelling of 79978959 in words is "seventy-nine million, nine hundred seventy-eight thousand, nine hundred fifty-nine".