117486581 has 4 divisors (see below), whose sum is σ = 120661932. Its totient is φ = 114311232.

The previous prime is 117486563. The next prime is 117486613. The reversal of 117486581 is 185684711.

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 54538225 + 62948356 = 7385^2 + 7934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117486581 is a prime.

It is a super-2 number, since 2×117486581² = 27606193430139122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117486181) 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, 1587620 + ... + 1587693.

It is an arithmetic number, because the mean of its divisors is an integer number (30165483).

Almost surely, 2^117486581 is an apocalyptic number.

It is an amenable number.

117486581 is a deficient number, since it is larger than the sum of its proper divisors (3175351).

117486581 is an equidigital number, since it uses as much as digits as its factorization.

117486581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175350.

The product of its digits is 53760, while the sum is 41.

The square root of 117486581 is about 10839.1227043520. The cubic root of 117486581 is about 489.7744081643.

The spelling of 117486581 in words is "one hundred seventeen million, four hundred eighty-six thousand, five hundred eighty-one".