198343287 has 24 divisors (see below), whose sum is σ = 289926000. Its totient is φ = 130656768.

The previous prime is 198343279. The next prime is 198343303. The reversal of 198343287 is 782343891.

It is not a de Polignac number, because 198343287 - 2³ = 198343279 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198343217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 473164 + ... + 473582.

It is an arithmetic number, because the mean of its divisors is an integer number (12080250).

Almost surely, 2^198343287 is an apocalyptic number.

198343287 is a deficient number, since it is larger than the sum of its proper divisors (91582713).

198343287 is a wasteful number, since it uses less digits than its factorization.

With its successor (198343288) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (924).

With its successor (198343288) it forms an eRAP, since the sums of their prime factors are consecutive (927 and 928).

198343287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 924 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 198343287 is about 14083.4401692200. The cubic root of 198343287 is about 583.1843156406.

The spelling of 198343287 in words is "one hundred ninety-eight million, three hundred forty-three thousand, two hundred eighty-seven".