113840681 has 4 divisors (see below), whose sum is σ = 113980164. Its totient is φ = 113701200.

The previous prime is 113840669. The next prime is 113840707. The reversal of 113840681 is 186048311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72675625 + 41165056 = 8525^2 + 6416^2 .

It is a cyclic number.

It is not a de Polignac number, because 113840681 - 2¹⁴ = 113824297 is a prime.

It is a super-2 number, since 2×113840681² = 25919401301087522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113840611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68510 + ... + 70151.

It is an arithmetic number, because the mean of its divisors is an integer number (28495041).

Almost surely, 2^113840681 is an apocalyptic number.

It is an amenable number.

113840681 is a deficient number, since it is larger than the sum of its proper divisors (139483).

113840681 is an equidigital number, since it uses as much as digits as its factorization.

113840681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139482.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 113840681 is about 10669.6148477815. The cubic root of 113840681 is about 484.6547739863.

Adding to 113840681 its reverse (186048311), we get a palindrome (299888992).

The spelling of 113840681 in words is "one hundred thirteen million, eight hundred forty thousand, six hundred eighty-one".