116779409 has 6 divisors (see below), whose sum is σ = 124053174. Its totient is φ = 109909760.

The previous prime is 116779391. The next prime is 116779457. The reversal of 116779409 is 904977611.

It can be written as a sum of positive squares in 3 ways, for example, as 71351809 + 45427600 = 8447^2 + 6740^2 .

It is not a de Polignac number, because 116779409 - 2⁸ = 116779153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 116779409.

It is not an unprimeable number, because it can be changed into a prime (116779489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201752 + ... + 202329.

It is an arithmetic number, because the mean of its divisors is an integer number (20675529).

Almost surely, 2^116779409 is an apocalyptic number.

It is an amenable number.

116779409 is a deficient number, since it is larger than the sum of its proper divisors (7273765).

116779409 is an equidigital number, since it uses as much as digits as its factorization.

116779409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404115 (or 404098 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 116779409 is about 10806.4521930188. The cubic root of 116779409 is about 488.7897510202.

The spelling of 116779409 in words is "one hundred sixteen million, seven hundred seventy-nine thousand, four hundred nine".