23129039 has 2 divisors, whose sum is σ = 23129040. Its totient is φ = 23129038.

The previous prime is 23129021. The next prime is 23129059. The reversal of 23129039 is 93092132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23129039 is a prime.

It is equal to p_1455824 and since 23129039 and 1455824 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23129059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11564519 + 11564520.

It is an arithmetic number, because the mean of its divisors is an integer number (11564520).

Almost surely, 2^23129039 is an apocalyptic number.

23129039 is a deficient number, since it is larger than the sum of its proper divisors (1).

23129039 is an equidigital number, since it uses as much as digits as its factorization.

23129039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 23129039 is about 4809.2659523050. The cubic root of 23129039 is about 284.9175466823.

The spelling of 23129039 in words is "twenty-three million, one hundred twenty-nine thousand, thirty-nine".