113601721 has 2 divisors, whose sum is σ = 113601722. Its totient is φ = 113601720.

The previous prime is 113601673. The next prime is 113601749. The reversal of 113601721 is 127106311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75951225 + 37650496 = 8715^2 + 6136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113601721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113601692 and 113601701.

It is not a weakly prime, because it can be changed into another prime (113601791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56800860 + 56800861.

It is an arithmetic number, because the mean of its divisors is an integer number (56800861).

Almost surely, 2^113601721 is an apocalyptic number.

It is an amenable number.

113601721 is a deficient number, since it is larger than the sum of its proper divisors (1).

113601721 is an equidigital number, since it uses as much as digits as its factorization.

113601721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 113601721 is about 10658.4108102475. The cubic root of 113601721 is about 484.3154277121.

The spelling of 113601721 in words is "one hundred thirteen million, six hundred one thousand, seven hundred twenty-one".