23154139 has 2 divisors, whose sum is σ = 23154140. Its totient is φ = 23154138.

The previous prime is 23154133. The next prime is 23154143. The reversal of 23154139 is 93145132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23154139 - 2⁷ = 23154011 is a prime.

It is a super-2 number, since 2×23154139² = 1072228305662642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23154133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11577069 + 11577070.

It is an arithmetic number, because the mean of its divisors is an integer number (11577070).

Almost surely, 2^23154139 is an apocalyptic number.

23154139 is a deficient number, since it is larger than the sum of its proper divisors (1).

23154139 is an equidigital number, since it uses as much as digits as its factorization.

23154139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 23154139 is about 4811.8747905572. The cubic root of 23154139 is about 285.0205751022.

The spelling of 23154139 in words is "twenty-three million, one hundred fifty-four thousand, one hundred thirty-nine".