113928721 has 2 divisors, whose sum is σ = 113928722. Its totient is φ = 113928720.

The previous prime is 113928701. The next prime is 113928757. The reversal of 113928721 is 127829311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102232321 + 11696400 = 10111^2 + 3420^2 .

It is an emirp because it is prime and its reverse (127829311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113928721 - 2⁹ = 113928209 is a prime.

It is not a weakly prime, because it can be changed into another prime (113928701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56964360 + 56964361.

It is an arithmetic number, because the mean of its divisors is an integer number (56964361).

Almost surely, 2^113928721 is an apocalyptic number.

It is an amenable number.

113928721 is a deficient number, since it is larger than the sum of its proper divisors (1).

113928721 is an equidigital number, since it uses as much as digits as its factorization.

113928721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 113928721 is about 10673.7397850988. The cubic root of 113928721 is about 484.7796795740.

The spelling of 113928721 in words is "one hundred thirteen million, nine hundred twenty-eight thousand, seven hundred twenty-one".