117516409 has 2 divisors, whose sum is σ = 117516410. Its totient is φ = 117516408.

The previous prime is 117516389. The next prime is 117516433. The reversal of 117516409 is 904615711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68558400 + 48958009 = 8280^2 + 6997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117516409 is a prime.

It is not a weakly prime, because it can be changed into another prime (117516109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58758204 + 58758205.

It is an arithmetic number, because the mean of its divisors is an integer number (58758205).

Almost surely, 2^117516409 is an apocalyptic number.

It is an amenable number.

117516409 is a deficient number, since it is larger than the sum of its proper divisors (1).

117516409 is an equidigital number, since it uses as much as digits as its factorization.

117516409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 117516409 is about 10840.4985586457. The cubic root of 117516409 is about 489.8158533369.

The spelling of 117516409 in words is "one hundred seventeen million, five hundred sixteen thousand, four hundred nine".