124123949 has 2 divisors, whose sum is σ = 124123950. Its totient is φ = 124123948.

The previous prime is 124123943. The next prime is 124123957. The reversal of 124123949 is 949321421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111978724 + 12145225 = 10582^2 + 3485^2 .

It is a cyclic number.

It is not a de Polignac number, because 124123949 - 2²⁰ = 123075373 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124123943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62061974 + 62061975.

It is an arithmetic number, because the mean of its divisors is an integer number (62061975).

Almost surely, 2^124123949 is an apocalyptic number.

It is an amenable number.

124123949 is a deficient number, since it is larger than the sum of its proper divisors (1).

124123949 is an equidigital number, since it uses as much as digits as its factorization.

124123949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 124123949 is about 11141.0928099536. The cubic root of 124123949 is about 498.8291925598.

It can be divided in two parts, 12412 and 3949, that added together give a palindrome (16361).

The spelling of 124123949 in words is "one hundred twenty-four million, one hundred twenty-three thousand, nine hundred forty-nine".