23408989 has 2 divisors, whose sum is σ = 23408990. Its totient is φ = 23408988.

The previous prime is 23408981. The next prime is 23409011. The reversal of 23408989 is 98980432.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23328900 + 80089 = 4830^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 23408989 - 2³ = 23408981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23408981) 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, 11704494 + 11704495.

It is an arithmetic number, because the mean of its divisors is an integer number (11704495).

Almost surely, 2^23408989 is an apocalyptic number.

It is an amenable number.

23408989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23408989 is an equidigital number, since it uses as much as digits as its factorization.

23408989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 23408989 is about 4838.2836832910. The cubic root of 23408989 is about 286.0624710715.

The spelling of 23408989 in words is "twenty-three million, four hundred eight thousand, nine hundred eighty-nine".