138899177 has 4 divisors (see below), whose sum is σ = 146209680. Its totient is φ = 131588676.

The previous prime is 138899171. The next prime is 138899191. The reversal of 138899177 is 771998831.

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 138899177 - 2¹⁰ = 138898153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138899171) 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, 3655223 + ... + 3655260.

It is an arithmetic number, because the mean of its divisors is an integer number (36552420).

Almost surely, 2^138899177 is an apocalyptic number.

It is an amenable number.

138899177 is a deficient number, since it is larger than the sum of its proper divisors (7310503).

138899177 is an equidigital number, since it uses as much as digits as its factorization.

138899177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7310502.

The product of its digits is 762048, while the sum is 53.

The square root of 138899177 is about 11785.5494992809. The cubic root of 138899177 is about 517.8848710312.

The spelling of 138899177 in words is "one hundred thirty-eight million, eight hundred ninety-nine thousand, one hundred seventy-seven".