198049801 has 2 divisors, whose sum is σ = 198049802. Its totient is φ = 198049800.

The previous prime is 198049777. The next prime is 198049807. The reversal of 198049801 is 108940891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123210000 + 74839801 = 11100^2 + 8651^2 .

It is a cyclic number.

It is not a de Polignac number, because 198049801 - 2¹⁵ = 198017033 is a prime.

It is a super-2 number, since 2×198049801² = 78447447352279202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198049807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99024900 + 99024901.

It is an arithmetic number, because the mean of its divisors is an integer number (99024901).

Almost surely, 2^198049801 is an apocalyptic number.

It is an amenable number.

198049801 is a deficient number, since it is larger than the sum of its proper divisors (1).

198049801 is an equidigital number, since it uses as much as digits as its factorization.

198049801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 198049801 is about 14073.0167696909. The cubic root of 198049801 is about 582.8965302166.

The spelling of 198049801 in words is "one hundred ninety-eight million, forty-nine thousand, eight hundred one".