23130509 has 2 divisors, whose sum is σ = 23130510. Its totient is φ = 23130508.

The previous prime is 23130493. The next prime is 23130521. The reversal of 23130509 is 90503132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15721225 + 7409284 = 3965^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 23130509 - 2⁴ = 23130493 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 (23130409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565254 + 11565255.

It is an arithmetic number, because the mean of its divisors is an integer number (11565255).

Almost surely, 2^23130509 is an apocalyptic number.

It is an amenable number.

23130509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23130509 is an equidigital number, since it uses as much as digits as its factorization.

23130509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 23130509 is about 4809.4187798527. The cubic root of 23130509 is about 284.9235826719.

The spelling of 23130509 in words is "twenty-three million, one hundred thirty thousand, five hundred nine".