116540909 has 4 divisors (see below), whose sum is σ = 116607420. Its totient is φ = 116474400.

The previous prime is 116540887. The next prime is 116540911. The reversal of 116540909 is 909045611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 909045611 = 10739 ⋅84649.

It can be written as a sum of positive squares in 2 ways, for example, as 58094884 + 58446025 = 7622^2 + 7645^2 .

It is a cyclic number.

It is not a de Polignac number, because 116540909 - 2⁸ = 116540653 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 (116540969) 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, 30554 + ... + 34155.

It is an arithmetic number, because the mean of its divisors is an integer number (29151855).

Almost surely, 2^116540909 is an apocalyptic number.

It is an amenable number.

116540909 is a deficient number, since it is larger than the sum of its proper divisors (66511).

116540909 is an equidigital number, since it uses as much as digits as its factorization.

116540909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66510.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 116540909 is about 10795.4114789572. The cubic root of 116540909 is about 488.4567704929.

The spelling of 116540909 in words is "one hundred sixteen million, five hundred forty thousand, nine hundred nine".