138233653 has 4 divisors (see below), whose sum is σ = 138257280. Its totient is φ = 138210028.

The previous prime is 138233651. The next prime is 138233677. The reversal of 138233653 is 356332831.

138233653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 138233653 - 2¹ = 138233651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138233651) 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, 4188 + ... + 17146.

It is an arithmetic number, because the mean of its divisors is an integer number (34564320).

Almost surely, 2^138233653 is an apocalyptic number.

It is an amenable number.

138233653 is a deficient number, since it is larger than the sum of its proper divisors (23627).

138233653 is a wasteful number, since it uses less digits than its factorization.

138233653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23626.

The product of its digits is 38880, while the sum is 34.

The square root of 138233653 is about 11757.2808506049. The cubic root of 138233653 is about 517.0564121781.

The spelling of 138233653 in words is "one hundred thirty-eight million, two hundred thirty-three thousand, six hundred fifty-three".