23061509 has 2 divisors, whose sum is σ = 23061510. Its totient is φ = 23061508.

The previous prime is 23061491. The next prime is 23061523. The reversal of 23061509 is 90516032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14668900 + 8392609 = 3830^2 + 2897^2 .

It is a cyclic number.

It is not a de Polignac number, because 23061509 - 2⁸ = 23061253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23061529) 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, 11530754 + 11530755.

It is an arithmetic number, because the mean of its divisors is an integer number (11530755).

Almost surely, 2^23061509 is an apocalyptic number.

It is an amenable number.

23061509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23061509 is an equidigital number, since it uses as much as digits as its factorization.

23061509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 23061509 is about 4802.2399981675. The cubic root of 23061509 is about 284.6399845250.

The spelling of 23061509 in words is "twenty-three million, sixty-one thousand, five hundred nine".