23149909 has 2 divisors, whose sum is σ = 23149910. Its totient is φ = 23149908.

The previous prime is 23149877. The next prime is 23149921. The reversal of 23149909 is 90994132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 1387684 = 4665^2 + 1178^2 .

It is a cyclic number.

It is not a de Polignac number, because 23149909 - 2⁵ = 23149877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23149939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11574954 + 11574955.

It is an arithmetic number, because the mean of its divisors is an integer number (11574955).

Almost surely, 2^23149909 is an apocalyptic number.

It is an amenable number.

23149909 is a deficient number, since it is larger than the sum of its proper divisors (1).

23149909 is an equidigital number, since it uses as much as digits as its factorization.

23149909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 23149909 is about 4811.4352328593. The cubic root of 23149909 is about 285.0032173639.

The spelling of 23149909 in words is "twenty-three million, one hundred forty-nine thousand, nine hundred nine".