138980523 has 16 divisors (see below), whose sum is σ = 203054976. Its totient is φ = 83855040.

The previous prime is 138980507. The next prime is 138980549. The reversal of 138980523 is 325089831.

It is not a de Polignac number, because 138980523 - 2⁴ = 138980507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138980503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1786 + ... + 16767.

It is an arithmetic number, because the mean of its divisors is an integer number (12690936).

Almost surely, 2^138980523 is an apocalyptic number.

138980523 is a deficient number, since it is larger than the sum of its proper divisors (64074453).

138980523 is a wasteful number, since it uses less digits than its factorization.

138980523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18794.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 138980523 is about 11789.0000848248. Note that the first 4 decimals coincide. The cubic root of 138980523 is about 517.9859506831.

The spelling of 138980523 in words is "one hundred thirty-eight million, nine hundred eighty thousand, five hundred twenty-three".