123021937 has 2 divisors, whose sum is σ = 123021938. Its totient is φ = 123021936.

The previous prime is 123021923. The next prime is 123021947. The reversal of 123021937 is 739120321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62742241 + 60279696 = 7921^2 + 7764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123021937 is a prime.

It is equal to p_7003837 and since 123021937 and 7003837 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (123021947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510968 + 61510969.

It is an arithmetic number, because the mean of its divisors is an integer number (61510969).

Almost surely, 2^123021937 is an apocalyptic number.

It is an amenable number.

123021937 is a deficient number, since it is larger than the sum of its proper divisors (1).

123021937 is an equidigital number, since it uses as much as digits as its factorization.

123021937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 123021937 is about 11091.5254586554. The cubic root of 123021937 is about 497.3485471155.

The spelling of 123021937 in words is "one hundred twenty-three million, twenty-one thousand, nine hundred thirty-seven".