116860781 has 4 divisors (see below), whose sum is σ = 117121500. Its totient is φ = 116600064.

The previous prime is 116860721. The next prime is 116860819. The reversal of 116860781 is 187068611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102191881 + 14668900 = 10109^2 + 3830^2 .

It is a cyclic number.

It is not a de Polignac number, because 116860781 - 2⁶ = 116860717 is a prime.

It is a super-2 number, since 2×116860781² = 27312884271859922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116860721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129686 + ... + 130583.

It is an arithmetic number, because the mean of its divisors is an integer number (29280375).

Almost surely, 2^116860781 is an apocalyptic number.

It is an amenable number.

116860781 is a deficient number, since it is larger than the sum of its proper divisors (260719).

116860781 is an equidigital number, since it uses as much as digits as its factorization.

116860781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260718.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 116860781 is about 10810.2165103202. The cubic root of 116860781 is about 488.9032543778.

The spelling of 116860781 in words is "one hundred sixteen million, eight hundred sixty thousand, seven hundred eighty-one".