23312997 has 12 divisors (see below), whose sum is σ = 34584940. Its totient is φ = 15121728.

The previous prime is 23312983. The next prime is 23312999. The reversal of 23312997 is 79921332.

It can be written as a sum of positive squares in 2 ways, for example, as 12383361 + 10929636 = 3519^2 + 3306^2 .

It is not a de Polignac number, because 23312997 - 2¹⁹ = 22788709 is a prime.

It is a Duffinian number.

23312997 is a modest number, since divided by 2997 gives 2331 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23312999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34672 + ... + 35337.

Almost surely, 2^23312997 is an apocalyptic number.

It is an amenable number.

23312997 is a deficient number, since it is larger than the sum of its proper divisors (11271943).

23312997 is a wasteful number, since it uses less digits than its factorization.

23312997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70052 (or 70049 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 23312997 is about 4828.3534460518. The cubic root of 23312997 is about 285.6709216450.

The spelling of 23312997 in words is "twenty-three million, three hundred twelve thousand, nine hundred ninety-seven".