23509273 has 2 divisors, whose sum is σ = 23509274. Its totient is φ = 23509272.

The previous prime is 23509237. The next prime is 23509279. The reversal of 23509273 is 37290532.

Together with previous prime (23509237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16257024 + 7252249 = 4032^2 + 2693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23509273 is a prime.

It is not a weakly prime, because it can be changed into another prime (23509279) 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, 11754636 + 11754637.

It is an arithmetic number, because the mean of its divisors is an integer number (11754637).

Almost surely, 2^23509273 is an apocalyptic number.

It is an amenable number.

23509273 is a deficient number, since it is larger than the sum of its proper divisors (1).

23509273 is an equidigital number, since it uses as much as digits as its factorization.

23509273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 23509273 is about 4848.6362000051. The cubic root of 23509273 is about 286.4703858883.

The spelling of 23509273 in words is "twenty-three million, five hundred nine thousand, two hundred seventy-three".