116991539 has 8 divisors (see below), whose sum is σ = 138315360. Its totient is φ = 96820416.

The previous prime is 116991529. The next prime is 116991541. The reversal of 116991539 is 935199611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 116991539 - 2¹² = 116987443 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 116991539.

It is not an unprimeable number, because it can be changed into a prime (116991529) 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, 287954 + ... + 288359.

It is an arithmetic number, because the mean of its divisors is an integer number (17289420).

Almost surely, 2^116991539 is an apocalyptic number.

116991539 is a deficient number, since it is larger than the sum of its proper divisors (21323821).

116991539 is an equidigital number, since it uses as much as digits as its factorization.

116991539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576349.

The product of its digits is 65610, while the sum is 44.

The square root of 116991539 is about 10816.2627094575. The cubic root of 116991539 is about 489.0855344736.

The spelling of 116991539 in words is "one hundred sixteen million, nine hundred ninety-one thousand, five hundred thirty-nine".