138775137 has 8 divisors (see below), whose sum is σ = 185228736. Its totient is φ = 92419152.

The previous prime is 138775129. The next prime is 138775151. The reversal of 138775137 is 731577831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138775137 - 2³ = 138775129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138773137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21018 + ... + 26819.

It is an arithmetic number, because the mean of its divisors is an integer number (23153592).

Almost surely, 2^138775137 is an apocalyptic number.

It is an amenable number.

138775137 is a deficient number, since it is larger than the sum of its proper divisors (46453599).

138775137 is an equidigital number, since it uses as much as digits as its factorization.

138775137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48807.

The product of its digits is 123480, while the sum is 42.

The square root of 138775137 is about 11780.2859472935. The cubic root of 138775137 is about 517.7306642836.

The spelling of 138775137 in words is "one hundred thirty-eight million, seven hundred seventy-five thousand, one hundred thirty-seven".