113091961 has 2 divisors, whose sum is σ = 113091962. Its totient is φ = 113091960.

The previous prime is 113091949. The next prime is 113091977. The reversal of 113091961 is 169190311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94867600 + 18224361 = 9740^2 + 4269^2 .

It is an emirp because it is prime and its reverse (169190311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113091961 - 2⁷ = 113091833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (113091911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56545980 + 56545981.

It is an arithmetic number, because the mean of its divisors is an integer number (56545981).

Almost surely, 2^113091961 is an apocalyptic number.

It is an amenable number.

113091961 is a deficient number, since it is larger than the sum of its proper divisors (1).

113091961 is an equidigital number, since it uses as much as digits as its factorization.

113091961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 113091961 is about 10634.4704146469. The cubic root of 113091961 is about 483.5899256928.

The spelling of 113091961 in words is "one hundred thirteen million, ninety-one thousand, nine hundred sixty-one".