23291729 has 2 divisors, whose sum is σ = 23291730. Its totient is φ = 23291728.

The previous prime is 23291707. The next prime is 23291747. The reversal of 23291729 is 92719232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22543504 + 748225 = 4748^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 23291729 - 2²⁰ = 22243153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23291029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11645864 + 11645865.

It is an arithmetic number, because the mean of its divisors is an integer number (11645865).

Almost surely, 2^23291729 is an apocalyptic number.

It is an amenable number.

23291729 is a deficient number, since it is larger than the sum of its proper divisors (1).

23291729 is an equidigital number, since it uses as much as digits as its factorization.

23291729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 23291729 is about 4826.1505364006. The cubic root of 23291729 is about 285.5840245140.

The spelling of 23291729 in words is "twenty-three million, two hundred ninety-one thousand, seven hundred twenty-nine".