117322721 has 2 divisors, whose sum is σ = 117322722. Its totient is φ = 117322720.

The previous prime is 117322697. The next prime is 117322757. The reversal of 117322721 is 127223711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80550625 + 36772096 = 8975^2 + 6064^2 .

It is an emirp because it is prime and its reverse (127223711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117322721 - 2⁶ = 117322657 is a prime.

It is not a weakly prime, because it can be changed into another prime (117322921) 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, 58661360 + 58661361.

It is an arithmetic number, because the mean of its divisors is an integer number (58661361).

Almost surely, 2^117322721 is an apocalyptic number.

It is an amenable number.

117322721 is a deficient number, since it is larger than the sum of its proper divisors (1).

117322721 is an equidigital number, since it uses as much as digits as its factorization.

117322721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 26.

The square root of 117322721 is about 10831.5613371296. The cubic root of 117322721 is about 489.5466040656.

The spelling of 117322721 in words is "one hundred seventeen million, three hundred twenty-two thousand, seven hundred twenty-one".