138465937 has 2 divisors, whose sum is σ = 138465938. Its totient is φ = 138465936.

The previous prime is 138465919. The next prime is 138465947. The reversal of 138465937 is 739564831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118026496 + 20439441 = 10864^2 + 4521^2 .

It is a cyclic number.

It is not a de Polignac number, because 138465937 - 2²³ = 130077329 is a prime.

It is not a weakly prime, because it can be changed into another prime (138465947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69232968 + 69232969.

It is an arithmetic number, because the mean of its divisors is an integer number (69232969).

Almost surely, 2^138465937 is an apocalyptic number.

It is an amenable number.

138465937 is a deficient number, since it is larger than the sum of its proper divisors (1).

138465937 is an equidigital number, since it uses as much as digits as its factorization.

138465937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 138465937 is about 11767.1550087521. The cubic root of 138465937 is about 517.3458658644.

The spelling of 138465937 in words is "one hundred thirty-eight million, four hundred sixty-five thousand, nine hundred thirty-seven".