23981117 has 2 divisors, whose sum is σ = 23981118. Its totient is φ = 23981116.

The previous prime is 23981099. The next prime is 23981123. The reversal of 23981117 is 71118932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23145721 + 835396 = 4811^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 23981117 - 2⁶ = 23981053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23981147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11990558 + 11990559.

It is an arithmetic number, because the mean of its divisors is an integer number (11990559).

Almost surely, 2^23981117 is an apocalyptic number.

It is an amenable number.

23981117 is a deficient number, since it is larger than the sum of its proper divisors (1).

23981117 is an equidigital number, since it uses as much as digits as its factorization.

23981117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 23981117 is about 4897.0518682162. The cubic root of 23981117 is about 288.3742442163.

The spelling of 23981117 in words is "twenty-three million, nine hundred eighty-one thousand, one hundred seventeen".