124649979 has 4 divisors (see below), whose sum is σ = 166199976. Its totient is φ = 83099984.

The previous prime is 124649957. The next prime is 124649983. The reversal of 124649979 is 979946421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 124649979 - 2⁷ = 124649851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124649989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20774994 + ... + 20774999.

It is an arithmetic number, because the mean of its divisors is an integer number (41549994).

Almost surely, 2^124649979 is an apocalyptic number.

124649979 is a deficient number, since it is larger than the sum of its proper divisors (41549997).

124649979 is an equidigital number, since it uses as much as digits as its factorization.

124649979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41549996.

The product of its digits is 979776, while the sum is 51.

The square root of 124649979 is about 11164.6754990909. The cubic root of 124649979 is about 499.5328690466.

The spelling of 124649979 in words is "one hundred twenty-four million, six hundred forty-nine thousand, nine hundred seventy-nine".