23012909 has 2 divisors, whose sum is σ = 23012910. Its totient is φ = 23012908.

The previous prime is 23012879. The next prime is 23012911. The reversal of 23012909 is 90921032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21114025 + 1898884 = 4595^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 23012909 - 2¹² = 23008813 is a prime.

Together with 23012911, it forms a pair of twin primes.

It is a Chen prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23012309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11506454 + 11506455.

It is an arithmetic number, because the mean of its divisors is an integer number (11506455).

Almost surely, 2^23012909 is an apocalyptic number.

It is an amenable number.

23012909 is a deficient number, since it is larger than the sum of its proper divisors (1).

23012909 is an equidigital number, since it uses as much as digits as its factorization.

23012909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 23012909 is about 4797.1771908071. The cubic root of 23012909 is about 284.4398930761.

The spelling of 23012909 in words is "twenty-three million, twelve thousand, nine hundred nine".