138265023 has 16 divisors (see below), whose sum is σ = 202761216. Its totient is φ = 83274720.

The previous prime is 138265009. The next prime is 138265031. The reversal of 138265023 is 320562831.

It is not a de Polignac number, because 138265023 - 2²² = 134070719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138265003) 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, 35883 + ... + 39548.

It is an arithmetic number, because the mean of its divisors is an integer number (12672576).

Almost surely, 2^138265023 is an apocalyptic number.

138265023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138265023 is a deficient number, since it is larger than the sum of its proper divisors (64496193).

138265023 is a wasteful number, since it uses less digits than its factorization.

138265023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75494.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 138265023 is about 11758.6148418936. The cubic root of 138265023 is about 517.0955218847.

The spelling of 138265023 in words is "one hundred thirty-eight million, two hundred sixty-five thousand, twenty-three".