116735581 has 2 divisors, whose sum is σ = 116735582. Its totient is φ = 116735580.

The previous prime is 116735579. The next prime is 116735657. The reversal of 116735581 is 185537611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91030681 + 25704900 = 9541^2 + 5070^2 .

It is a cyclic number.

It is not a de Polignac number, because 116735581 - 2¹ = 116735579 is a prime.

It is a super-2 number, since 2×116735581² = 27254391742815122, which contains 22 as substring.

Together with 116735579, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 116735581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116735551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58367790 + 58367791.

It is an arithmetic number, because the mean of its divisors is an integer number (58367791).

Almost surely, 2^116735581 is an apocalyptic number.

It is an amenable number.

116735581 is a deficient number, since it is larger than the sum of its proper divisors (1).

116735581 is an equidigital number, since it uses as much as digits as its factorization.

116735581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 37.

The square root of 116735581 is about 10804.4241401381. The cubic root of 116735581 is about 488.7285948113.

The spelling of 116735581 in words is "one hundred sixteen million, seven hundred thirty-five thousand, five hundred eighty-one".