198950057 has 2 divisors, whose sum is σ = 198950058. Its totient is φ = 198950056.

The previous prime is 198950047. The next prime is 198950111. The reversal of 198950057 is 750059891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138980521 + 59969536 = 11789^2 + 7744^2 .

It is a cyclic number.

It is not a de Polignac number, because 198950057 - 2⁴ = 198950041 is a prime.

It is a super-2 number, since 2×198950057² = 79162250360606498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198950047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99475028 + 99475029.

It is an arithmetic number, because the mean of its divisors is an integer number (99475029).

Almost surely, 2^198950057 is an apocalyptic number.

It is an amenable number.

198950057 is a deficient number, since it is larger than the sum of its proper divisors (1).

198950057 is an equidigital number, since it uses as much as digits as its factorization.

198950057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 198950057 is about 14104.9656858852. The cubic root of 198950057 is about 583.7784009830.

The spelling of 198950057 in words is "one hundred ninety-eight million, nine hundred fifty thousand, fifty-seven".