23717489 has 2 divisors, whose sum is σ = 23717490. Its totient is φ = 23717488.

The previous prime is 23717443. The next prime is 23717497. The reversal of 23717489 is 98471732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23116864 + 600625 = 4808^2 + 775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23717489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23717689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11858744 + 11858745.

It is an arithmetic number, because the mean of its divisors is an integer number (11858745).

Almost surely, 2^23717489 is an apocalyptic number.

It is an amenable number.

23717489 is a deficient number, since it is larger than the sum of its proper divisors (1).

23717489 is an equidigital number, since it uses as much as digits as its factorization.

23717489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 23717489 is about 4870.0604719038. The cubic root of 23717489 is about 287.3136344803.

The spelling of 23717489 in words is "twenty-three million, seven hundred seventeen thousand, four hundred eighty-nine".