23001809 has 2 divisors, whose sum is σ = 23001810. Its totient is φ = 23001808.

The previous prime is 23001793. The next prime is 23001829. The reversal of 23001809 is 90810032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22118209 + 883600 = 4703^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 23001809 - 2⁴ = 23001793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1448330 and since 23001809 and 1448330 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23001829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11500904 + 11500905.

It is an arithmetic number, because the mean of its divisors is an integer number (11500905).

Almost surely, 2^23001809 is an apocalyptic number.

It is an amenable number.

23001809 is a deficient number, since it is larger than the sum of its proper divisors (1).

23001809 is an equidigital number, since it uses as much as digits as its factorization.

23001809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 23001809 is about 4796.0201208919. The cubic root of 23001809 is about 284.3941536670.

The spelling of 23001809 in words is "twenty-three million, one thousand, eight hundred nine".