116989309 has 4 divisors (see below), whose sum is σ = 117131260. Its totient is φ = 116847360.

The previous prime is 116989307. The next prime is 116989361. The reversal of 116989309 is 903989611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903989611 = 7 ⋅129141373.

It can be written as a sum of positive squares in 2 ways, for example, as 29192409 + 87796900 = 5403^2 + 9370^2 .

It is a cyclic number.

It is not a de Polignac number, because 116989309 - 2¹ = 116989307 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 (116989307) 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, 69732 + ... + 71389.

It is an arithmetic number, because the mean of its divisors is an integer number (29282815).

Almost surely, 2^116989309 is an apocalyptic number.

It is an amenable number.

116989309 is a deficient number, since it is larger than the sum of its proper divisors (141951).

116989309 is an equidigital number, since it uses as much as digits as its factorization.

116989309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141950.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 116989309 is about 10816.1596234523. The cubic root of 116989309 is about 489.0824269336.

The spelling of 116989309 in words is "one hundred sixteen million, nine hundred eighty-nine thousand, three hundred nine".