23283721 has 4 divisors (see below), whose sum is σ = 24509200. Its totient is φ = 22058244.

The previous prime is 23283707. The next prime is 23283731. The reversal of 23283721 is 12738232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23283721 - 2⁷ = 23283593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23283721.

It is not an unprimeable number, because it can be changed into a prime (23283731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612711 + ... + 612748.

It is an arithmetic number, because the mean of its divisors is an integer number (6127300).

Almost surely, 2^23283721 is an apocalyptic number.

It is an amenable number.

23283721 is a deficient number, since it is larger than the sum of its proper divisors (1225479).

23283721 is a wasteful number, since it uses less digits than its factorization.

23283721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225478.

The product of its digits is 4032, while the sum is 28.

The square root of 23283721 is about 4825.3208183498. The cubic root of 23283721 is about 285.5512915924.

The spelling of 23283721 in words is "twenty-three million, two hundred eighty-three thousand, seven hundred twenty-one".