138365769 has 12 divisors (see below), whose sum is σ = 192859856. Its totient is φ = 88232232.

The previous prime is 138365761. The next prime is 138365779. The reversal of 138365769 is 967563831.

It is a happy number.

138365769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138365769 - 2³ = 138365761 is a prime.

It is a super-2 number, since 2×138365769² = 38290172061922722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138365761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42007 + ... + 45180.

Almost surely, 2^138365769 is an apocalyptic number.

It is an amenable number.

138365769 is a deficient number, since it is larger than the sum of its proper divisors (54494087).

138365769 is an equidigital number, since it uses as much as digits as its factorization.

138365769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87236 (or 87213 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 138365769 is about 11762.8979847655. The cubic root of 138365769 is about 517.2210842684.

The spelling of 138365769 in words is "one hundred thirty-eight million, three hundred sixty-five thousand, seven hundred sixty-nine".