113365991 has 2 divisors, whose sum is σ = 113365992. Its totient is φ = 113365990.

The previous prime is 113365981. The next prime is 113365997. The reversal of 113365991 is 199563311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113365991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113365997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56682995 + 56682996.

It is an arithmetic number, because the mean of its divisors is an integer number (56682996).

Almost surely, 2^113365991 is an apocalyptic number.

113365991 is a deficient number, since it is larger than the sum of its proper divisors (1).

113365991 is an equidigital number, since it uses as much as digits as its factorization.

113365991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 38.

The square root of 113365991 is about 10647.3466647799. The cubic root of 113365991 is about 483.9802017606.

The spelling of 113365991 in words is "one hundred thirteen million, three hundred sixty-five thousand, nine hundred ninety-one".