138233933 has 4 divisors (see below), whose sum is σ = 144244128. Its totient is φ = 132223740.

The previous prime is 138233903. The next prime is 138233941. The reversal of 138233933 is 339332831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138233933 - 2⁸ = 138233677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138233893 and 138233902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138233903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3005063 + ... + 3005108.

It is an arithmetic number, because the mean of its divisors is an integer number (36061032).

Almost surely, 2^138233933 is an apocalyptic number.

It is an amenable number.

138233933 is a deficient number, since it is larger than the sum of its proper divisors (6010195).

138233933 is an equidigital number, since it uses as much as digits as its factorization.

138233933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010194.

The product of its digits is 34992, while the sum is 35.

The square root of 138233933 is about 11757.2927581140. The cubic root of 138233933 is about 517.0567612868.

The spelling of 138233933 in words is "one hundred thirty-eight million, two hundred thirty-three thousand, nine hundred thirty-three".