138626983 has 16 divisors (see below), whose sum is σ = 159724800. Its totient is φ = 118990080.

The previous prime is 138626933. The next prime is 138627007. The reversal of 138626983 is 389626831.

It is not a de Polignac number, because 138626983 - 2¹⁷ = 138495911 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 (138626933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72838 + ... + 74716.

It is an arithmetic number, because the mean of its divisors is an integer number (9982800).

Almost surely, 2^138626983 is an apocalyptic number.

138626983 is a deficient number, since it is larger than the sum of its proper divisors (21097817).

138626983 is a wasteful number, since it uses less digits than its factorization.

138626983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262.

The product of its digits is 373248, while the sum is 46.

The square root of 138626983 is about 11773.9960506193. The cubic root of 138626983 is about 517.5463585004.

The spelling of 138626983 in words is "one hundred thirty-eight million, six hundred twenty-six thousand, nine hundred eighty-three".