198363839 has 4 divisors (see below), whose sum is σ = 198394224. Its totient is φ = 198333456.

The previous prime is 198363793. The next prime is 198363877. The reversal of 198363839 is 938363891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198363839 - 2²⁰ = 197315263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198362839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947 + ... + 19940.

It is an arithmetic number, because the mean of its divisors is an integer number (49598556).

Almost surely, 2^198363839 is an apocalyptic number.

198363839 is a deficient number, since it is larger than the sum of its proper divisors (30385).

198363839 is an equidigital number, since it uses as much as digits as its factorization.

198363839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30384.

The product of its digits is 839808, while the sum is 50.

The square root of 198363839 is about 14084.1698015893. The cubic root of 198363839 is about 583.2044578063.

The spelling of 198363839 in words is "one hundred ninety-eight million, three hundred sixty-three thousand, eight hundred thirty-nine".