138464597 has 2 divisors, whose sum is σ = 138464598. Its totient is φ = 138464596.

The previous prime is 138464587. The next prime is 138464639. The reversal of 138464597 is 795464831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107205316 + 31259281 = 10354^2 + 5591^2 .

It is a cyclic number.

It is not a de Polignac number, because 138464597 - 2⁴ = 138464581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138464537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69232298 + 69232299.

It is an arithmetic number, because the mean of its divisors is an integer number (69232299).

Almost surely, 2^138464597 is an apocalyptic number.

It is an amenable number.

138464597 is a deficient number, since it is larger than the sum of its proper divisors (1).

138464597 is an equidigital number, since it uses as much as digits as its factorization.

138464597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 138464597 is about 11767.0980704675. The cubic root of 138464597 is about 517.3441969925.

The spelling of 138464597 in words is "one hundred thirty-eight million, four hundred sixty-four thousand, five hundred ninety-seven".