116499981 has 24 divisors (see below), whose sum is σ = 171815040. Its totient is φ = 70152576.

The previous prime is 116499961. The next prime is 116500009. The reversal of 116499981 is 189994611.

It is a happy number.

It is not a de Polignac number, because 116499981 - 2⁶ = 116499917 is a prime.

It is a super-2 number, since 2×116499981² = 27144491146000722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 116499981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116499941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21385 + ... + 26273.

It is an arithmetic number, because the mean of its divisors is an integer number (7158960).

Almost surely, 2^116499981 is an apocalyptic number.

It is an amenable number.

116499981 is a deficient number, since it is larger than the sum of its proper divisors (55315059).

116499981 is a wasteful number, since it uses less digits than its factorization.

116499981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965 (or 4952 counting only the distinct ones).

The product of its digits is 139968, while the sum is 48.

The square root of 116499981 is about 10793.5156923034. The cubic root of 116499981 is about 488.3995834227.

The spelling of 116499981 in words is "one hundred sixteen million, four hundred ninety-nine thousand, nine hundred eighty-one".