23117513 has 2 divisors, whose sum is σ = 23117514. Its totient is φ = 23117512.

The previous prime is 23117477. The next prime is 23117527. The reversal of 23117513 is 31571132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12411529 + 10705984 = 3523^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 23117513 - 2⁶ = 23117449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23117543) 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, 11558756 + 11558757.

It is an arithmetic number, because the mean of its divisors is an integer number (11558757).

Almost surely, 2^23117513 is an apocalyptic number.

It is an amenable number.

23117513 is a deficient number, since it is larger than the sum of its proper divisors (1).

23117513 is an equidigital number, since it uses as much as digits as its factorization.

23117513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 23.

The square root of 23117513 is about 4808.0674912068. The cubic root of 23117513 is about 284.8702107294.

Adding to 23117513 its reverse (31571132), we get a palindrome (54688645).

The spelling of 23117513 in words is "twenty-three million, one hundred seventeen thousand, five hundred thirteen".