23323981 has 2 divisors, whose sum is σ = 23323982. Its totient is φ = 23323980.

The previous prime is 23323969. The next prime is 23324003. The reversal of 23323981 is 18932332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20331081 + 2992900 = 4509^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 23323981 - 2²³ = 14935373 is a prime.

It is a super-2 number, since 2×23323981² = 1088016179376722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23323901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11661990 + 11661991.

It is an arithmetic number, because the mean of its divisors is an integer number (11661991).

Almost surely, 2^23323981 is an apocalyptic number.

It is an amenable number.

23323981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23323981 is an equidigital number, since it uses as much as digits as its factorization.

23323981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 23323981 is about 4829.4907599042. The cubic root of 23323981 is about 285.7157795517.

The spelling of 23323981 in words is "twenty-three million, three hundred twenty-three thousand, nine hundred eighty-one".