113241991 has 2 divisors, whose sum is σ = 113241992. Its totient is φ = 113241990.

The previous prime is 113241983. The next prime is 113242001. The reversal of 113241991 is 199142311.

It is a weak prime.

It is an emirp because it is prime and its reverse (199142311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113241991 - 2³ = 113241983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113241391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56620995 + 56620996.

It is an arithmetic number, because the mean of its divisors is an integer number (56620996).

Almost surely, 2^113241991 is an apocalyptic number.

113241991 is a deficient number, since it is larger than the sum of its proper divisors (1).

113241991 is an equidigital number, since it uses as much as digits as its factorization.

113241991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 31.

The square root of 113241991 is about 10641.5220245978. The cubic root of 113241991 is about 483.8036778055.

The spelling of 113241991 in words is "one hundred thirteen million, two hundred forty-one thousand, nine hundred ninety-one".