23072909 has 2 divisors, whose sum is σ = 23072910. Its totient is φ = 23072908.

The previous prime is 23072879. The next prime is 23072963. The reversal of 23072909 is 90927032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13118884 + 9954025 = 3622^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 23072909 - 2²⁴ = 6295693 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is equal to p_1452569 and since 23072909 and 1452569 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23072969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11536454 + 11536455.

It is an arithmetic number, because the mean of its divisors is an integer number (11536455).

Almost surely, 2^23072909 is an apocalyptic number.

It is an amenable number.

23072909 is a deficient number, since it is larger than the sum of its proper divisors (1).

23072909 is an equidigital number, since it uses as much as digits as its factorization.

23072909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 23072909 is about 4803.4267976102. The cubic root of 23072909 is about 284.6868788441.

The spelling of 23072909 in words is "twenty-three million, seventy-two thousand, nine hundred nine".