138608597 has 4 divisors (see below), whose sum is σ = 138656640. Its totient is φ = 138560556.

The previous prime is 138608579. The next prime is 138608669. The reversal of 138608597 is 795806831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138608597 - 2⁸ = 138608341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138604597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19397 + ... + 25562.

It is an arithmetic number, because the mean of its divisors is an integer number (34664160).

Almost surely, 2^138608597 is an apocalyptic number.

It is an amenable number.

138608597 is a deficient number, since it is larger than the sum of its proper divisors (48043).

138608597 is an equidigital number, since it uses as much as digits as its factorization.

138608597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48042.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 138608597 is about 11773.2152362895. The cubic root of 138608597 is about 517.5234768846.

The spelling of 138608597 in words is "one hundred thirty-eight million, six hundred eight thousand, five hundred ninety-seven".