198049807 has 2 divisors, whose sum is σ = 198049808. Its totient is φ = 198049806.

The previous prime is 198049801. The next prime is 198049823. The reversal of 198049807 is 708940891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198049807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198049801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99024903 + 99024904.

It is an arithmetic number, because the mean of its divisors is an integer number (99024904).

Almost surely, 2^198049807 is an apocalyptic number.

198049807 is a deficient number, since it is larger than the sum of its proper divisors (1).

198049807 is an equidigital number, since it uses as much as digits as its factorization.

198049807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 198049807 is about 14073.0169828648. The cubic root of 198049807 is about 582.8965361029.

The spelling of 198049807 in words is "one hundred ninety-eight million, forty-nine thousand, eight hundred seven".