117513731 has 4 divisors (see below), whose sum is σ = 118834200. Its totient is φ = 116193264.

The previous prime is 117513719. The next prime is 117513743. The reversal of 117513731 is 137315711.

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

It is an interprime number because it is at equal distance from previous prime (117513719) and next prime (117513743).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117513731 is a prime.

It is a super-2 number, since 2×117513731² = 27618953947080722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117513694 and 117513703.

It is not an unprimeable number, because it can be changed into a prime (117513761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660101 + ... + 660278.

It is an arithmetic number, because the mean of its divisors is an integer number (29708550).

Almost surely, 2^117513731 is an apocalyptic number.

117513731 is a deficient number, since it is larger than the sum of its proper divisors (1320469).

117513731 is an equidigital number, since it uses as much as digits as its factorization.

117513731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320468.

The product of its digits is 2205, while the sum is 29.

The square root of 117513731 is about 10840.3750396377. The cubic root of 117513731 is about 489.8121326173.

The spelling of 117513731 in words is "one hundred seventeen million, five hundred thirteen thousand, seven hundred thirty-one".