116509909 has 2 divisors, whose sum is σ = 116509910. Its totient is φ = 116509908.

The previous prime is 116509903. The next prime is 116509951. The reversal of 116509909 is 909905611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90193009 + 26316900 = 9497^2 + 5130^2 .

It is a cyclic number.

It is not a de Polignac number, because 116509909 - 2⁹ = 116509397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116509903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58254954 + 58254955.

It is an arithmetic number, because the mean of its divisors is an integer number (58254955).

Almost surely, 2^116509909 is an apocalyptic number.

It is an amenable number.

116509909 is a deficient number, since it is larger than the sum of its proper divisors (1).

116509909 is an equidigital number, since it uses as much as digits as its factorization.

116509909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 116509909 is about 10793.9755882622. The cubic root of 116509909 is about 488.4134566534.

The spelling of 116509909 in words is "one hundred sixteen million, five hundred nine thousand, nine hundred nine".