198007859 has 8 divisors (see below), whose sum is σ = 228077568. Its totient is φ = 168383880.

The previous prime is 198007837. The next prime is 198007867. The reversal of 198007859 is 958700891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198007859 - 2⁸ = 198007603 is a prime.

It is a super-2 number, since 2×198007859² = 78414224451527762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198007829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110477 + ... + 112254.

It is an arithmetic number, because the mean of its divisors is an integer number (28509696).

Almost surely, 2^198007859 is an apocalyptic number.

198007859 is a deficient number, since it is larger than the sum of its proper divisors (30069709).

198007859 is a wasteful number, since it uses less digits than its factorization.

198007859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222865.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 198007859 is about 14071.5265341043. The cubic root of 198007859 is about 582.8553796706.

The spelling of 198007859 in words is "one hundred ninety-eight million, seven thousand, eight hundred fifty-nine".