198457601 has 2 divisors, whose sum is σ = 198457602. Its totient is φ = 198457600.

The previous prime is 198457591. The next prime is 198457607. The reversal of 198457601 is 106754891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121000000 + 77457601 = 11000^2 + 8801^2 .

It is a cyclic number.

It is not a de Polignac number, because 198457601 - 2²² = 194263297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (198457607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99228800 + 99228801.

It is an arithmetic number, because the mean of its divisors is an integer number (99228801).

Almost surely, 2^198457601 is an apocalyptic number.

It is an amenable number.

198457601 is a deficient number, since it is larger than the sum of its proper divisors (1).

198457601 is an equidigital number, since it uses as much as digits as its factorization.

198457601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 198457601 is about 14087.4980390416. The cubic root of 198457601 is about 583.2963324195.

The spelling of 198457601 in words is "one hundred ninety-eight million, four hundred fifty-seven thousand, six hundred one".