113609917 has 2 divisors, whose sum is σ = 113609918. Its totient is φ = 113609916.

The previous prime is 113609897. The next prime is 113609921. The reversal of 113609917 is 719906311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106069401 + 7540516 = 10299^2 + 2746^2 .

It is an emirp because it is prime and its reverse (719906311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113609917 - 2⁷ = 113609789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113609117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56804958 + 56804959.

It is an arithmetic number, because the mean of its divisors is an integer number (56804959).

Almost surely, 2^113609917 is an apocalyptic number.

It is an amenable number.

113609917 is a deficient number, since it is larger than the sum of its proper divisors (1).

113609917 is an equidigital number, since it uses as much as digits as its factorization.

113609917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 113609917 is about 10658.7952883992. The cubic root of 113609917 is about 484.3270747006.

The spelling of 113609917 in words is "one hundred thirteen million, six hundred nine thousand, nine hundred seventeen".