113603721 has 32 divisors (see below), whose sum is σ = 193256448. Its totient is φ = 57637440.

The previous prime is 113603713. The next prime is 113603729. The reversal of 113603721 is 127306311.

It is an interprime number because it is at equal distance from previous prime (113603713) and next prime (113603729).

It is not a de Polignac number, because 113603721 - 2³ = 113603713 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 113603691 and 113603700.

It is not an unprimeable number, because it can be changed into a prime (113603729) 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 in 31 ways as a sum of consecutive naturals, for example, 4215 + ... + 15651.

It is an arithmetic number, because the mean of its divisors is an integer number (6039264).

Almost surely, 2^113603721 is an apocalyptic number.

113603721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113603721 is a deficient number, since it is larger than the sum of its proper divisors (79652727).

113603721 is a wasteful number, since it uses less digits than its factorization.

113603721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11501.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 113603721 is about 10658.5046324520. The cubic root of 113603721 is about 484.3182698791.

The spelling of 113603721 in words is "one hundred thirteen million, six hundred three thousand, seven hundred twenty-one".