198610807 has 2 divisors, whose sum is σ = 198610808. Its totient is φ = 198610806.

The previous prime is 198610801. The next prime is 198610817. The reversal of 198610807 is 708016891.

It is a weak prime.

It is an emirp because it is prime and its reverse (708016891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198610807 - 2³ = 198610799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198610807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198610801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99305403 + 99305404.

It is an arithmetic number, because the mean of its divisors is an integer number (99305404).

Almost surely, 2^198610807 is an apocalyptic number.

198610807 is a deficient number, since it is larger than the sum of its proper divisors (1).

198610807 is an equidigital number, since it uses as much as digits as its factorization.

198610807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 198610807 is about 14092.9346482555. The cubic root of 198610807 is about 583.4463921994.

The spelling of 198610807 in words is "one hundred ninety-eight million, six hundred ten thousand, eight hundred seven".