23125409 has 2 divisors, whose sum is σ = 23125410. Its totient is φ = 23125408.

The previous prime is 23125393. The next prime is 23125447. The reversal of 23125409 is 90452132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 4635409 = 4300^2 + 2153^2 .

It is a cyclic number.

It is not a de Polignac number, because 23125409 - 2⁴ = 23125393 is a prime.

It is a super-3 number, since 3×23125409³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23125469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11562704 + 11562705.

It is an arithmetic number, because the mean of its divisors is an integer number (11562705).

Almost surely, 2^23125409 is an apocalyptic number.

It is an amenable number.

23125409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23125409 is an equidigital number, since it uses as much as digits as its factorization.

23125409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 23125409 is about 4808.8885410248. Note that the first 3 decimals coincide. The cubic root of 23125409 is about 284.9026403877.

The spelling of 23125409 in words is "twenty-three million, one hundred twenty-five thousand, four hundred nine".