23115729 has 16 divisors (see below), whose sum is σ = 37933952. Its totient is φ = 12192768.

The previous prime is 23115721. The next prime is 23115731. The reversal of 23115729 is 92751132.

It is not a de Polignac number, because 23115729 - 2³ = 23115721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23115696 and 23115705.

It is not an unprimeable number, because it can be changed into a prime (23115721) 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 in 15 ways as a sum of consecutive naturals, for example, 42064 + ... + 42609.

It is an arithmetic number, because the mean of its divisors is an integer number (2370872).

Almost surely, 2^23115729 is an apocalyptic number.

It is an amenable number.

23115729 is a deficient number, since it is larger than the sum of its proper divisors (14818223).

23115729 is a wasteful number, since it uses less digits than its factorization.

23115729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84696.

The product of its digits is 3780, while the sum is 30.

The square root of 23115729 is about 4807.8819661052. The cubic root of 23115729 is about 284.8628826411.

The spelling of 23115729 in words is "twenty-three million, one hundred fifteen thousand, seven hundred twenty-nine".