116749781 has 4 divisors (see below), whose sum is σ = 117180864. Its totient is φ = 116318700.

The previous prime is 116749777. The next prime is 116749783. The reversal of 116749781 is 187947611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 116749781 - 2² = 116749777 is a prime.

It is a super-2 number, since 2×116749781² = 27261022727095922, 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 (116749783) 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, 215135 + ... + 215676.

It is an arithmetic number, because the mean of its divisors is an integer number (29295216).

Almost surely, 2^116749781 is an apocalyptic number.

It is an amenable number.

116749781 is a deficient number, since it is larger than the sum of its proper divisors (431083).

116749781 is an equidigital number, since it uses as much as digits as its factorization.

116749781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431082.

The product of its digits is 84672, while the sum is 44.

The square root of 116749781 is about 10805.0812583710. The cubic root of 116749781 is about 488.7484107195.

The spelling of 116749781 in words is "one hundred sixteen million, seven hundred forty-nine thousand, seven hundred eighty-one".