124991979 has 16 divisors (see below), whose sum is σ = 190858752. Its totient is φ = 71275968.

The previous prime is 124991887. The next prime is 124992017. The reversal of 124991979 is 979199421.

It is not a de Polignac number, because 124991979 - 2⁷ = 124991851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124941979) 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, 4647 + ... + 16479.

It is an arithmetic number, because the mean of its divisors is an integer number (11928672).

Almost surely, 2^124991979 is an apocalyptic number.

124991979 is a deficient number, since it is larger than the sum of its proper divisors (65866773).

124991979 is a wasteful number, since it uses less digits than its factorization.

124991979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12346.

The product of its digits is 367416, while the sum is 51.

The square root of 124991979 is about 11179.9811717194. The cubic root of 124991979 is about 499.9893051046.

The spelling of 124991979 in words is "one hundred twenty-four million, nine hundred ninety-one thousand, nine hundred seventy-nine".