117998197 has 2 divisors, whose sum is σ = 117998198. Its totient is φ = 117998196.

The previous prime is 117998159. The next prime is 117998201. The reversal of 117998197 is 791899711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116445681 + 1552516 = 10791^2 + 1246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117998197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117998107) 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, 58999098 + 58999099.

It is an arithmetic number, because the mean of its divisors is an integer number (58999099).

Almost surely, 2^117998197 is an apocalyptic number.

It is an amenable number.

117998197 is a deficient number, since it is larger than the sum of its proper divisors (1).

117998197 is an equidigital number, since it uses as much as digits as its factorization.

117998197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 52.

The square root of 117998197 is about 10862.6975010814. The cubic root of 117998197 is about 490.4843149823.

The spelling of 117998197 in words is "one hundred seventeen million, nine hundred ninety-eight thousand, one hundred ninety-seven".