124879999 has 2 divisors, whose sum is σ = 124880000. Its totient is φ = 124879998.

The previous prime is 124879991. The next prime is 124880009. The reversal of 124879999 is 999978421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124879999 - 2³ = 124879991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124879991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62439999 + 62440000.

It is an arithmetic number, because the mean of its divisors is an integer number (62440000).

Almost surely, 2^124879999 is an apocalyptic number.

124879999 is a deficient number, since it is larger than the sum of its proper divisors (1).

124879999 is an equidigital number, since it uses as much as digits as its factorization.

124879999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 58.

The square root of 124879999 is about 11174.9719910164. The cubic root of 124879999 is about 499.8399474385.

The spelling of 124879999 in words is "one hundred twenty-four million, eight hundred seventy-nine thousand, nine hundred ninety-nine".