23542139 has 2 divisors, whose sum is σ = 23542140. Its totient is φ = 23542138.

The previous prime is 23542111. The next prime is 23542153. The reversal of 23542139 is 93124532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23542139 - 2⁸ = 23541883 is a prime.

It is not a weakly prime, because it can be changed into another prime (23542039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11771069 + 11771070.

It is an arithmetic number, because the mean of its divisors is an integer number (11771070).

Almost surely, 2^23542139 is an apocalyptic number.

23542139 is a deficient number, since it is larger than the sum of its proper divisors (1).

23542139 is an equidigital number, since it uses as much as digits as its factorization.

23542139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 23542139 is about 4852.0242167574. The cubic root of 23542139 is about 286.6038190752.

The spelling of 23542139 in words is "twenty-three million, five hundred forty-two thousand, one hundred thirty-nine".