198643347 has 40 divisors (see below), whose sum is σ = 356998400. Its totient is φ = 107530416.

The previous prime is 198643339. The next prime is 198643349. The reversal of 198643347 is 743346891.

It is not a de Polignac number, because 198643347 - 2³ = 198643339 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198643349) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1554 + ... + 19992.

It is an arithmetic number, because the mean of its divisors is an integer number (8924960).

Almost surely, 2^198643347 is an apocalyptic number.

198643347 is a deficient number, since it is larger than the sum of its proper divisors (158355053).

198643347 is a wasteful number, since it uses less digits than its factorization.

198643347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18477 (or 18468 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 198643347 is about 14094.0890801783. The cubic root of 198643347 is about 583.4782540253.

It can be divided in two parts, 198 and 643347, that added together give a triangular number (643545 = T₁₁₃₄).

The spelling of 198643347 in words is "one hundred ninety-eight million, six hundred forty-three thousand, three hundred forty-seven".