117416581 has 2 divisors, whose sum is σ = 117416582. Its totient is φ = 117416580.

The previous prime is 117416491. The next prime is 117416609. The reversal of 117416581 is 185614711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82192356 + 35224225 = 9066^2 + 5935^2 .

It is a cyclic number.

It is not a de Polignac number, because 117416581 - 2¹⁵ = 117383813 is a prime.

It is a super-2 number, since 2×117416581² = 27573306987459122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117416681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58708290 + 58708291.

It is an arithmetic number, because the mean of its divisors is an integer number (58708291).

Almost surely, 2^117416581 is an apocalyptic number.

It is an amenable number.

117416581 is a deficient number, since it is larger than the sum of its proper divisors (1).

117416581 is an equidigital number, since it uses as much as digits as its factorization.

117416581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 34.

The square root of 117416581 is about 10835.8931796138. The cubic root of 117416581 is about 489.6771175644.

The spelling of 117416581 in words is "one hundred seventeen million, four hundred sixteen thousand, five hundred eighty-one".