23312789 has 2 divisors, whose sum is σ = 23312790. Its totient is φ = 23312788.

The previous prime is 23312767. The next prime is 23312803. The reversal of 23312789 is 98721332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16851025 + 6461764 = 4105^2 + 2542^2 .

It is a cyclic number.

It is not a de Polignac number, because 23312789 - 2¹⁶ = 23247253 is a prime.

It is a super-2 number, since 2×23312789² = 1086972261917042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23312759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11656394 + 11656395.

It is an arithmetic number, because the mean of its divisors is an integer number (11656395).

Almost surely, 2^23312789 is an apocalyptic number.

It is an amenable number.

23312789 is a deficient number, since it is larger than the sum of its proper divisors (1).

23312789 is an equidigital number, since it uses as much as digits as its factorization.

23312789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 23312789 is about 4828.3319065698. The cubic root of 23312789 is about 285.6700720512.

The spelling of 23312789 in words is "twenty-three million, three hundred twelve thousand, seven hundred eighty-nine".