23459809 has 2 divisors, whose sum is σ = 23459810. Its totient is φ = 23459808.

The previous prime is 23459803. The next prime is 23459819. The reversal of 23459809 is 90895432.

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., 22515025 + 944784 = 4745^2 + 972^2 .

It is a cyclic number.

It is not a de Polignac number, because 23459809 - 2⁹ = 23459297 is a prime.

It is not a weakly prime, because it can be changed into another prime (23459803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11729904 + 11729905.

It is an arithmetic number, because the mean of its divisors is an integer number (11729905).

Almost surely, 2^23459809 is an apocalyptic number.

It is an amenable number.

23459809 is a deficient number, since it is larger than the sum of its proper divisors (1).

23459809 is an equidigital number, since it uses as much as digits as its factorization.

23459809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 23459809 is about 4843.5326983515. The cubic root of 23459809 is about 286.2693315955.

The spelling of 23459809 in words is "twenty-three million, four hundred fifty-nine thousand, eight hundred nine".