116231309 has 4 divisors (see below), whose sum is σ = 116564700. Its totient is φ = 115897920.

The previous prime is 116231293. The next prime is 116231321. The reversal of 116231309 is 903132611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903132611 = 557 ⋅1621423.

It can be written as a sum of positive squares in 2 ways, for example, as 55547209 + 60684100 = 7453^2 + 7790^2 .

It is a cyclic number.

It is not a de Polignac number, because 116231309 - 2⁴ = 116231293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116231359) 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, 166172 + ... + 166869.

It is an arithmetic number, because the mean of its divisors is an integer number (29141175).

Almost surely, 2^116231309 is an apocalyptic number.

It is an amenable number.

116231309 is a deficient number, since it is larger than the sum of its proper divisors (333391).

116231309 is an equidigital number, since it uses as much as digits as its factorization.

116231309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333390.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 116231309 is about 10781.0625172104. The cubic root of 116231309 is about 488.0238457509.

The spelling of 116231309 in words is "one hundred sixteen million, two hundred thirty-one thousand, three hundred nine".