117998857 has 2 divisors, whose sum is σ = 117998858. Its totient is φ = 117998856.

The previous prime is 117998821. The next prime is 117998869. The reversal of 117998857 is 758899711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110901961 + 7096896 = 10531^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 117998857 - 2¹⁹ = 117474569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117998798 and 117998807.

It is not a weakly prime, because it can be changed into another prime (117998897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58999428 + 58999429.

It is an arithmetic number, because the mean of its divisors is an integer number (58999429).

Almost surely, 2^117998857 is an apocalyptic number.

It is an amenable number.

117998857 is a deficient number, since it is larger than the sum of its proper divisors (1).

117998857 is an equidigital number, since it uses as much as digits as its factorization.

117998857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 55.

The square root of 117998857 is about 10862.7278802334. The cubic root of 117998857 is about 490.4852294568.

The spelling of 117998857 in words is "one hundred seventeen million, nine hundred ninety-eight thousand, eight hundred fifty-seven".