113906161 has 2 divisors, whose sum is σ = 113906162. Its totient is φ = 113906160.

The previous prime is 113906153. The next prime is 113906201. The reversal of 113906161 is 161609311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103408561 + 10497600 = 10169^2 + 3240^2 .

It is an emirp because it is prime and its reverse (161609311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113906161 - 2³ = 113906153 is a prime.

It is a super-2 number, since 2×113906161² = 25949227027515842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113906761) 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, 56953080 + 56953081.

It is an arithmetic number, because the mean of its divisors is an integer number (56953081).

Almost surely, 2^113906161 is an apocalyptic number.

It is an amenable number.

113906161 is a deficient number, since it is larger than the sum of its proper divisors (1).

113906161 is an equidigital number, since it uses as much as digits as its factorization.

113906161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 113906161 is about 10672.6829335458. The cubic root of 113906161 is about 484.7476790055.

The spelling of 113906161 in words is "one hundred thirteen million, nine hundred six thousand, one hundred sixty-one".