117321851 has 2 divisors, whose sum is σ = 117321852. Its totient is φ = 117321850.

The previous prime is 117321833. The next prime is 117321863. The reversal of 117321851 is 158123711.

It is a strong prime.

It is an emirp because it is prime and its reverse (158123711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117321851 is a prime.

It is not a weakly prime, because it can be changed into another prime (117321871) 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, 58660925 + 58660926.

It is an arithmetic number, because the mean of its divisors is an integer number (58660926).

Almost surely, 2^117321851 is an apocalyptic number.

117321851 is a deficient number, since it is larger than the sum of its proper divisors (1).

117321851 is an equidigital number, since it uses as much as digits as its factorization.

117321851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 117321851 is about 10831.5211766400. The cubic root of 117321851 is about 489.5453939942.

The spelling of 117321851 in words is "one hundred seventeen million, three hundred twenty-one thousand, eight hundred fifty-one".