23538139 has 2 divisors, whose sum is σ = 23538140. Its totient is φ = 23538138.

The previous prime is 23538127. The next prime is 23538143. The reversal of 23538139 is 93183532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23538139 - 2²³ = 15149531 is a prime.

It is not a weakly prime, because it can be changed into another prime (23538839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11769069 + 11769070.

It is an arithmetic number, because the mean of its divisors is an integer number (11769070).

Almost surely, 2^23538139 is an apocalyptic number.

23538139 is a deficient number, since it is larger than the sum of its proper divisors (1).

23538139 is an equidigital number, since it uses as much as digits as its factorization.

23538139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 23538139 is about 4851.6120001501. The cubic root of 23538139 is about 286.5875860527.

The spelling of 23538139 in words is "twenty-three million, five hundred thirty-eight thousand, one hundred thirty-nine".