116715581 has 2 divisors, whose sum is σ = 116715582. Its totient is φ = 116715580.

The previous prime is 116715563. The next prime is 116715607. The reversal of 116715581 is 185517611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109202500 + 7513081 = 10450^2 + 2741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116715581 is a prime.

It is a super-2 number, since 2×116715581² = 27245053696335122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116715281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58357790 + 58357791.

It is an arithmetic number, because the mean of its divisors is an integer number (58357791).

Almost surely, 2^116715581 is an apocalyptic number.

It is an amenable number.

116715581 is a deficient number, since it is larger than the sum of its proper divisors (1).

116715581 is an equidigital number, since it uses as much as digits as its factorization.

116715581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 35.

The square root of 116715581 is about 10803.4985537093. The cubic root of 116715581 is about 488.7006823557.

The spelling of 116715581 in words is "one hundred sixteen million, seven hundred fifteen thousand, five hundred eighty-one".