116781539 has 4 divisors (see below), whose sum is σ = 133464624. Its totient is φ = 100098456.

The previous prime is 116781523. The next prime is 116781541. The reversal of 116781539 is 935187611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935187611 = 4721 ⋅198091.

It is a cyclic number.

It is not a de Polignac number, because 116781539 - 2⁴ = 116781523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 116781496 and 116781505.

It is not an unprimeable number, because it can be changed into a prime (116781589) 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, 8341532 + ... + 8341545.

It is an arithmetic number, because the mean of its divisors is an integer number (33366156).

Almost surely, 2^116781539 is an apocalyptic number.

116781539 is a deficient number, since it is larger than the sum of its proper divisors (16683085).

116781539 is an equidigital number, since it uses as much as digits as its factorization.

116781539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16683084.

The product of its digits is 45360, while the sum is 41.

The square root of 116781539 is about 10806.5507448029. The cubic root of 116781539 is about 488.7927227651.

The spelling of 116781539 in words is "one hundred sixteen million, seven hundred eighty-one thousand, five hundred thirty-nine".