138990163 has 12 divisors (see below), whose sum is σ = 150865200. Its totient is φ = 127991136.

The previous prime is 138990161. The next prime is 138990191. The reversal of 138990163 is 361099831.

It is not a de Polignac number, because 138990163 - 2¹ = 138990161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138990161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100545 + ... + 101917.

It is an arithmetic number, because the mean of its divisors is an integer number (12572100).

Almost surely, 2^138990163 is an apocalyptic number.

138990163 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138990163 is a deficient number, since it is larger than the sum of its proper divisors (11875037).

138990163 is a wasteful number, since it uses less digits than its factorization.

138990163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998 (or 1985 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 138990163 is about 11789.4089334453. The cubic root of 138990163 is about 517.9979266277.

The spelling of 138990163 in words is "one hundred thirty-eight million, nine hundred ninety thousand, one hundred sixty-three".