123918937 has 2 divisors, whose sum is σ = 123918938. Its totient is φ = 123918936.

The previous prime is 123918923. The next prime is 123918941. The reversal of 123918937 is 739819321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123743376 + 175561 = 11124^2 + 419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123918937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123918893 and 123918902.

It is not a weakly prime, because it can be changed into another prime (123918037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61959468 + 61959469.

It is an arithmetic number, because the mean of its divisors is an integer number (61959469).

Almost surely, 2^123918937 is an apocalyptic number.

It is an amenable number.

123918937 is a deficient number, since it is larger than the sum of its proper divisors (1).

123918937 is an equidigital number, since it uses as much as digits as its factorization.

123918937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 123918937 is about 11131.8882944449. Note that the first 3 decimals coincide. The cubic root of 123918937 is about 498.5544072176.

The spelling of 123918937 in words is "one hundred twenty-three million, nine hundred eighteen thousand, nine hundred thirty-seven".