23172113 has 2 divisors, whose sum is σ = 23172114. Its totient is φ = 23172112.

The previous prime is 23172089. The next prime is 23172133. The reversal of 23172113 is 31127132.

It is an a-pointer prime, because the next prime (23172133) can be obtained adding 23172113 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22963264 + 208849 = 4792^2 + 457^2 .

It is a cyclic number.

It is not a de Polignac number, because 23172113 - 2⁶ = 23172049 is a prime.

It is not a weakly prime, because it can be changed into another prime (23172133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11586056 + 11586057.

It is an arithmetic number, because the mean of its divisors is an integer number (11586057).

Almost surely, 2^23172113 is an apocalyptic number.

It is an amenable number.

23172113 is a deficient number, since it is larger than the sum of its proper divisors (1).

23172113 is an equidigital number, since it uses as much as digits as its factorization.

23172113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 20.

The square root of 23172113 is about 4813.7420994482. The cubic root of 23172113 is about 285.0943075607.

Adding to 23172113 its reverse (31127132), we get a palindrome (54299245).

The spelling of 23172113 in words is "twenty-three million, one hundred seventy-two thousand, one hundred thirteen".