198107957 has 2 divisors, whose sum is σ = 198107958. Its totient is φ = 198107956.

The previous prime is 198107929. The next prime is 198107981. The reversal of 198107957 is 759701891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99880036 + 98227921 = 9994^2 + 9911^2 .

It is a cyclic number.

It is not a de Polignac number, because 198107957 - 2¹⁴ = 198091573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198107557) 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, 99053978 + 99053979.

It is an arithmetic number, because the mean of its divisors is an integer number (99053979).

Almost surely, 2^198107957 is an apocalyptic number.

It is an amenable number.

198107957 is a deficient number, since it is larger than the sum of its proper divisors (1).

198107957 is an equidigital number, since it uses as much as digits as its factorization.

198107957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 198107957 is about 14075.0828416745. The cubic root of 198107957 is about 582.9535791893.

The spelling of 198107957 in words is "one hundred ninety-eight million, one hundred seven thousand, nine hundred fifty-seven".