138376994 has 16 divisors (see below), whose sum is σ = 244870656. Its totient is φ = 57391200.

The previous prime is 138376961. The next prime is 138377021. The reversal of 138376994 is 499673831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158987 + ... + 159854.

It is an arithmetic number, because the mean of its divisors is an integer number (15304416).

Almost surely, 2^138376994 is an apocalyptic number.

138376994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138376994 is a deficient number, since it is larger than the sum of its proper divisors (106493662).

138376994 is a wasteful number, since it uses less digits than its factorization.

138376994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318881.

The product of its digits is 979776, while the sum is 50.

The square root of 138376994 is about 11763.3751109110. The cubic root of 138376994 is about 517.2350705062.

The spelling of 138376994 in words is "one hundred thirty-eight million, three hundred seventy-six thousand, nine hundred ninety-four".