138372877 has 32 divisors (see below), whose sum is σ = 160963200. Its totient is φ = 118130688.

The previous prime is 138372851. The next prime is 138372881. The reversal of 138372877 is 778273831.

It is a de Polignac number, because none of the positive numbers 2^k-138372877 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 (138376877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1009953 + ... + 1010089.

It is an arithmetic number, because the mean of its divisors is an integer number (5030100).

Almost surely, 2^138372877 is an apocalyptic number.

138372877 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138372877 is a deficient number, since it is larger than the sum of its proper divisors (22590323).

138372877 is a wasteful number, since it uses less digits than its factorization.

138372877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285.

The product of its digits is 395136, while the sum is 46.

The square root of 138372877 is about 11763.2001173150. The cubic root of 138372877 is about 517.2299408532.

The spelling of 138372877 in words is "one hundred thirty-eight million, three hundred seventy-two thousand, eight hundred seventy-seven".