198289807 has 2 divisors, whose sum is σ = 198289808. Its totient is φ = 198289806.

The previous prime is 198289781. The next prime is 198289811. The reversal of 198289807 is 708982891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198289807 - 2²³ = 189901199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198289837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99144903 + 99144904.

It is an arithmetic number, because the mean of its divisors is an integer number (99144904).

Almost surely, 2^198289807 is an apocalyptic number.

198289807 is a deficient number, since it is larger than the sum of its proper divisors (1).

198289807 is an equidigital number, since it uses as much as digits as its factorization.

198289807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 198289807 is about 14081.5413573941. The cubic root of 198289807 is about 583.1318955809.

The spelling of 198289807 in words is "one hundred ninety-eight million, two hundred eighty-nine thousand, eight hundred seven".