116497981 has 2 divisors, whose sum is σ = 116497982. Its totient is φ = 116497980.

The previous prime is 116497973. The next prime is 116497993. The reversal of 116497981 is 189794611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82973881 + 33524100 = 9109^2 + 5790^2 .

It is a cyclic number.

It is not a de Polignac number, because 116497981 - 2³ = 116497973 is a prime.

It is a super-2 number, since 2×116497981² = 27143559154152722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116497951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58248990 + 58248991.

It is an arithmetic number, because the mean of its divisors is an integer number (58248991).

Almost surely, 2^116497981 is an apocalyptic number.

It is an amenable number.

116497981 is a deficient number, since it is larger than the sum of its proper divisors (1).

116497981 is an equidigital number, since it uses as much as digits as its factorization.

116497981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 46.

The square root of 116497981 is about 10793.4230436873. The cubic root of 116497981 is about 488.3967885588.

The spelling of 116497981 in words is "one hundred sixteen million, four hundred ninety-seven thousand, nine hundred eighty-one".