23474721 has 4 divisors (see below), whose sum is σ = 31299632. Its totient is φ = 15649812.

The previous prime is 23474701. The next prime is 23474741. The reversal of 23474721 is 12747432.

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 an interprime number because it is at equal distance from previous prime (23474701) and next prime (23474741).

It is not a de Polignac number, because 23474721 - 2⁷ = 23474593 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23474701) 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, 3912451 + ... + 3912456.

It is an arithmetic number, because the mean of its divisors is an integer number (7824908).

Almost surely, 2^23474721 is an apocalyptic number.

It is an amenable number.

23474721 is a deficient number, since it is larger than the sum of its proper divisors (7824911).

23474721 is an equidigital number, since it uses as much as digits as its factorization.

23474721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7824910.

The product of its digits is 9408, while the sum is 30.

The square root of 23474721 is about 4845.0718260930. The cubic root of 23474721 is about 286.3299735230.

The spelling of 23474721 in words is "twenty-three million, four hundred seventy-four thousand, seven hundred twenty-one".