117213236809 has 2 divisors, whose sum is σ = 117213236810. Its totient is φ = 117213236808.

The previous prime is 117213236747. The next prime is 117213236839. The reversal of 117213236809 is 908632312711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100222896400 + 16990340409 = 316580^2 + 130347^2 .

It is a cyclic number.

It is not a de Polignac number, because 117213236809 - 2¹⁵ = 117213204041 is a prime.

It is not a weakly prime, because it can be changed into another prime (117213236839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58606618404 + 58606618405.

It is an arithmetic number, because the mean of its divisors is an integer number (58606618405).

Almost surely, 2^117213236809 is an apocalyptic number.

It is an amenable number.

117213236809 is a deficient number, since it is larger than the sum of its proper divisors (1).

117213236809 is an equidigital number, since it uses as much as digits as its factorization.

117213236809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 117213236809 in words is "one hundred seventeen billion, two hundred thirteen million, two hundred thirty-six thousand, eight hundred nine".