113998681 has 4 divisors (see below), whose sum is σ = 117929700. Its totient is φ = 110067664.

The previous prime is 113998657. The next prime is 113998693. The reversal of 113998681 is 186899311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186899311 = 23 ⋅8126057.

It can be written as a sum of positive squares in 2 ways, for example, as 53158681 + 60840000 = 7291^2 + 7800^2 .

It is a cyclic number.

It is not a de Polignac number, because 113998681 - 2¹³ = 113990489 is a prime.

It is a super-2 number, since 2×113998681² = 25991398539479522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113998981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965466 + ... + 1965523.

It is an arithmetic number, because the mean of its divisors is an integer number (29482425).

Almost surely, 2^113998681 is an apocalyptic number.

It is an amenable number.

113998681 is a deficient number, since it is larger than the sum of its proper divisors (3931019).

113998681 is an equidigital number, since it uses as much as digits as its factorization.

113998681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931018.

The product of its digits is 93312, while the sum is 46.

The square root of 113998681 is about 10677.0164840184. The cubic root of 113998681 is about 484.8788885250.

The spelling of 113998681 in words is "one hundred thirteen million, nine hundred ninety-eight thousand, six hundred eighty-one".