138233651 has 2 divisors, whose sum is σ = 138233652. Its totient is φ = 138233650.

The previous prime is 138233629. The next prime is 138233677. The reversal of 138233651 is 156332831.

138233651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138233651 - 2⁶ = 138233587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138233351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69116825 + 69116826.

It is an arithmetic number, because the mean of its divisors is an integer number (69116826).

Almost surely, 2^138233651 is an apocalyptic number.

138233651 is a deficient number, since it is larger than the sum of its proper divisors (1).

138233651 is an equidigital number, since it uses as much as digits as its factorization.

138233651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 138233651 is about 11757.2807655512. The cubic root of 138233651 is about 517.0564096845.

The spelling of 138233651 in words is "one hundred thirty-eight million, two hundred thirty-three thousand, six hundred fifty-one".