138592377 has 64 divisors (see below), whose sum is σ = 259461120. Its totient is φ = 71908560.

The previous prime is 138592373. The next prime is 138592379. The reversal of 138592377 is 773295831.

It is a happy number.

It is not a de Polignac number, because 138592377 - 2² = 138592373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138592373) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 167988 + ... + 168810.

It is an arithmetic number, because the mean of its divisors is an integer number (4054080).

Almost surely, 2^138592377 is an apocalyptic number.

It is an amenable number.

138592377 is a deficient number, since it is larger than the sum of its proper divisors (120868743).

138592377 is an frugal number, since it uses more digits than its factorization.

138592377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 844 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 138592377 is about 11772.5263643791. The cubic root of 138592377 is about 517.5032892040.

The spelling of 138592377 in words is "one hundred thirty-eight million, five hundred ninety-two thousand, three hundred seventy-seven".