23997709 has 2 divisors, whose sum is σ = 23997710. Its totient is φ = 23997708.

The previous prime is 23997691. The next prime is 23997731. The reversal of 23997709 is 90779932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22610025 + 1387684 = 4755^2 + 1178^2 .

It is a cyclic number.

It is not a de Polignac number, because 23997709 - 2⁷ = 23997581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23997749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11998854 + 11998855.

It is an arithmetic number, because the mean of its divisors is an integer number (11998855).

Almost surely, 2^23997709 is an apocalyptic number.

It is an amenable number.

23997709 is a deficient number, since it is larger than the sum of its proper divisors (1).

23997709 is an equidigital number, since it uses as much as digits as its factorization.

23997709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 23997709 is about 4898.7456557776. The cubic root of 23997709 is about 288.4407354534.

The spelling of 23997709 in words is "twenty-three million, nine hundred ninety-seven thousand, seven hundred nine".