116491781 has 8 divisors (see below), whose sum is σ = 133870464. Its totient is φ = 99297360.

The previous prime is 116491777. The next prime is 116491807. The reversal of 116491781 is 187194611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 116491781 - 2² = 116491777 is a prime.

It is a super-2 number, since 2×116491781² = 27140670081103922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116491751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44705 + ... + 47238.

It is an arithmetic number, because the mean of its divisors is an integer number (16733808).

Almost surely, 2^116491781 is an apocalyptic number.

It is an amenable number.

116491781 is a deficient number, since it is larger than the sum of its proper divisors (17378683).

116491781 is an equidigital number, since it uses as much as digits as its factorization.

116491781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92131.

The product of its digits is 12096, while the sum is 38.

The square root of 116491781 is about 10793.1358279232. The cubic root of 116491781 is about 488.3881242776.

The spelling of 116491781 in words is "one hundred sixteen million, four hundred ninety-one thousand, seven hundred eighty-one".