113747681 has 2 divisors, whose sum is σ = 113747682. Its totient is φ = 113747680.

The previous prime is 113747671. The next prime is 113747687. The reversal of 113747681 is 186747311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73805281 + 39942400 = 8591^2 + 6320^2 .

It is an emirp because it is prime and its reverse (186747311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113747681 - 2²⁶ = 46638817 is a prime.

It is a super-2 number, since 2×113747681² = 25877069865755522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (113747687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56873840 + 56873841.

It is an arithmetic number, because the mean of its divisors is an integer number (56873841).

Almost surely, 2^113747681 is an apocalyptic number.

It is an amenable number.

113747681 is a deficient number, since it is larger than the sum of its proper divisors (1).

113747681 is an equidigital number, since it uses as much as digits as its factorization.

113747681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 113747681 is about 10665.2557868998. The cubic root of 113747681 is about 484.5227615019.

The spelling of 113747681 in words is "one hundred thirteen million, seven hundred forty-seven thousand, six hundred eighty-one".