113687731 has 2 divisors, whose sum is σ = 113687732. Its totient is φ = 113687730.

The previous prime is 113687701. The next prime is 113687767. The reversal of 113687731 is 137786311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113687731 is a prime.

It is a super-4 number, since 4×113687731⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (113687701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56843865 + 56843866.

It is an arithmetic number, because the mean of its divisors is an integer number (56843866).

Almost surely, 2^113687731 is an apocalyptic number.

113687731 is a deficient number, since it is larger than the sum of its proper divisors (1).

113687731 is an equidigital number, since it uses as much as digits as its factorization.

113687731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 113687731 is about 10662.4448884859. Note that the first 3 decimals coincide. The cubic root of 113687731 is about 484.4376249851.

The spelling of 113687731 in words is "one hundred thirteen million, six hundred eighty-seven thousand, seven hundred thirty-one".