116781109 has 8 divisors (see below), whose sum is σ = 123825240. Its totient is φ = 109756416.

The previous prime is 116781107. The next prime is 116781127. The reversal of 116781109 is 901187611.

It can be written as a sum of positive squares in 4 ways, for example, as 14326225 + 102454884 = 3785^2 + 10122^2 .

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 116781109 - 2¹ = 116781107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116781107) 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, 8607 + ... + 17539.

It is an arithmetic number, because the mean of its divisors is an integer number (15478155).

Almost surely, 2^116781109 is an apocalyptic number.

It is an amenable number.

116781109 is a deficient number, since it is larger than the sum of its proper divisors (7044131).

116781109 is an equidigital number, since it uses as much as digits as its factorization.

116781109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9719.

The product of its (nonzero) digits is 3024, while the sum is 34.

The square root of 116781109 is about 10806.5308494447. The cubic root of 116781109 is about 488.7921228383.

The spelling of 116781109 in words is "one hundred sixteen million, seven hundred eighty-one thousand, one hundred nine".