116861181 has 4 divisors (see below), whose sum is σ = 155814912. Its totient is φ = 77907452.

The previous prime is 116861161. The next prime is 116861203. The reversal of 116861181 is 181168611.

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 116861181 - 2⁵ = 116861149 is a prime.

It is a super-2 number, since 2×116861181² = 27313071249429522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116861161) 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, 19476861 + ... + 19476866.

It is an arithmetic number, because the mean of its divisors is an integer number (38953728).

Almost surely, 2^116861181 is an apocalyptic number.

It is an amenable number.

116861181 is a deficient number, since it is larger than the sum of its proper divisors (38953731).

116861181 is an equidigital number, since it uses as much as digits as its factorization.

116861181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38953730.

The product of its digits is 2304, while the sum is 33.

The square root of 116861181 is about 10810.2350113214. The cubic root of 116861181 is about 488.9038121956.

The spelling of 116861181 in words is "one hundred sixteen million, eight hundred sixty-one thousand, one hundred eighty-one".