23445139 has 2 divisors, whose sum is σ = 23445140. Its totient is φ = 23445138.

The previous prime is 23445131. The next prime is 23445143. The reversal of 23445139 is 93154432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23445139 - 2³ = 23445131 is a prime.

It is a Chen prime.

It is equal to p_1474483 and since 23445139 and 1474483 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23445139.

It is not a weakly prime, because it can be changed into another prime (23445131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11722569 + 11722570.

It is an arithmetic number, because the mean of its divisors is an integer number (11722570).

Almost surely, 2^23445139 is an apocalyptic number.

23445139 is a deficient number, since it is larger than the sum of its proper divisors (1).

23445139 is an equidigital number, since it uses as much as digits as its factorization.

23445139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 23445139 is about 4842.0180710113. The cubic root of 23445139 is about 286.2096487174.

The spelling of 23445139 in words is "twenty-three million, four hundred forty-five thousand, one hundred thirty-nine".