123949937 has 2 divisors, whose sum is σ = 123949938. Its totient is φ = 123949936.

The previous prime is 123949919. The next prime is 123949961. The reversal of 123949937 is 739949321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123454321 + 495616 = 11111^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 123949937 - 2⁸ = 123949681 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123949891 and 123949900.

It is not a weakly prime, because it can be changed into another prime (123949337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61974968 + 61974969.

It is an arithmetic number, because the mean of its divisors is an integer number (61974969).

Almost surely, 2^123949937 is an apocalyptic number.

It is an amenable number.

123949937 is a deficient number, since it is larger than the sum of its proper divisors (1).

123949937 is an equidigital number, since it uses as much as digits as its factorization.

123949937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 47.

The square root of 123949937 is about 11133.2806036675. The cubic root of 123949937 is about 498.5959771299.

The spelling of 123949937 in words is "one hundred twenty-three million, nine hundred forty-nine thousand, nine hundred thirty-seven".