23132509 has 2 divisors, whose sum is σ = 23132510. Its totient is φ = 23132508.

The previous prime is 23132497. The next prime is 23132513. The reversal of 23132509 is 90523132.

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., 20052484 + 3080025 = 4478^2 + 1755^2 .

It is a cyclic number.

It is not a de Polignac number, because 23132509 - 2⁵ = 23132477 is a prime.

It is a super-2 number, since 2×23132509² = 1070225945270162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23132579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11566254 + 11566255.

It is an arithmetic number, because the mean of its divisors is an integer number (11566255).

Almost surely, 2^23132509 is an apocalyptic number.

It is an amenable number.

23132509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23132509 is an equidigital number, since it uses as much as digits as its factorization.

23132509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 23132509 is about 4809.6267006910. The cubic root of 23132509 is about 284.9317944921.

The spelling of 23132509 in words is "twenty-three million, one hundred thirty-two thousand, five hundred nine".