117746809 has 2 divisors, whose sum is σ = 117746810. Its totient is φ = 117746808.

The previous prime is 117746807. The next prime is 117746843. The reversal of 117746809 is 908647711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93026025 + 24720784 = 9645^2 + 4972^2 .

It is an emirp because it is prime and its reverse (908647711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117746809 - 2¹ = 117746807 is a prime.

It is a super-2 number, since 2×117746809² = 27728622059364962, which contains 22 as substring.

Together with 117746807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117746801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58873404 + 58873405.

It is an arithmetic number, because the mean of its divisors is an integer number (58873405).

Almost surely, 2^117746809 is an apocalyptic number.

It is an amenable number.

117746809 is a deficient number, since it is larger than the sum of its proper divisors (1).

117746809 is an equidigital number, since it uses as much as digits as its factorization.

117746809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 117746809 is about 10851.1201725905. The cubic root of 117746809 is about 490.1357516418.

The spelling of 117746809 in words is "one hundred seventeen million, seven hundred forty-six thousand, eight hundred nine".