23297721 has 8 divisors (see below), whose sum is σ = 31087680. Its totient is φ = 15519792.

The previous prime is 23297713. The next prime is 23297723. The reversal of 23297721 is 12779232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23297721 - 2³ = 23297713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23297723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3571 + ... + 7703.

It is an arithmetic number, because the mean of its divisors is an integer number (3885960).

Almost surely, 2^23297721 is an apocalyptic number.

It is an amenable number.

23297721 is a deficient number, since it is larger than the sum of its proper divisors (7789959).

23297721 is a wasteful number, since it uses less digits than its factorization.

23297721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6015.

The product of its digits is 10584, while the sum is 33.

The square root of 23297721 is about 4826.7712810946. The cubic root of 23297721 is about 285.6085120728.

The spelling of 23297721 in words is "twenty-three million, two hundred ninety-seven thousand, seven hundred twenty-one".