23439289 has 2 divisors, whose sum is σ = 23439290. Its totient is φ = 23439288.

The previous prime is 23439287. The next prime is 23439341. The reversal of 23439289 is 98293432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23425600 + 13689 = 4840^2 + 117^2 .

It is a cyclic number.

It is not a de Polignac number, because 23439289 - 2¹ = 23439287 is a prime.

Together with 23439287, it forms a pair of twin primes.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (23439287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11719644 + 11719645.

It is an arithmetic number, because the mean of its divisors is an integer number (11719645).

Almost surely, 2^23439289 is an apocalyptic number.

It is an amenable number.

23439289 is a deficient number, since it is larger than the sum of its proper divisors (1).

23439289 is an equidigital number, since it uses as much as digits as its factorization.

23439289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 23439289 is about 4841.4139463591. The cubic root of 23439289 is about 286.1858418532.

The spelling of 23439289 in words is "twenty-three million, four hundred thirty-nine thousand, two hundred eighty-nine".