116609 has 4 divisors (see below), whose sum is σ = 120660. Its totient is φ = 112560.

The previous prime is 116593. The next prime is 116639. The reversal of 116609 is 906611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29584 + 87025 = 172^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 116609 - 2⁴ = 116593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116639) 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, 1982 + ... + 2039.

It is an arithmetic number, because the mean of its divisors is an integer number (30165).

2¹¹⁶⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

116609 is a deficient number, since it is larger than the sum of its proper divisors (4051).

116609 is an equidigital number, since it uses as much as digits as its factorization.

116609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 116609 is about 341.4805997418. The cubic root of 116609 is about 48.8551881686.

The spelling of 116609 in words is "one hundred sixteen thousand, six hundred nine".