23312729 has 16 divisors (see below), whose sum is σ = 27397440. Its totient is φ = 19599360.

The previous prime is 23312693. The next prime is 23312743. The reversal of 23312729 is 92721332.

It is not a de Polignac number, because 23312729 - 2¹² = 23308633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23312759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9977 + ... + 12089.

It is an arithmetic number, because the mean of its divisors is an integer number (1712340).

Almost surely, 2^23312729 is an apocalyptic number.

It is an amenable number.

23312729 is a deficient number, since it is larger than the sum of its proper divisors (4084711).

23312729 is a wasteful number, since it uses less digits than its factorization.

23312729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its digits is 4536, while the sum is 29.

The square root of 23312729 is about 4828.3256932398. The cubic root of 23312729 is about 285.6698269752.

The spelling of 23312729 in words is "twenty-three million, three hundred twelve thousand, seven hundred twenty-nine".