198922823 has 8 divisors (see below), whose sum is σ = 217117056. Its totient is φ = 180747000.

The previous prime is 198922819. The next prime is 198922873. The reversal of 198922823 is 328229891.

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

It is a cyclic number.

It is not a de Polignac number, because 198922823 - 2² = 198922819 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 (198922813) 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, 28190 + ... + 34532.

It is an arithmetic number, because the mean of its divisors is an integer number (27139632).

Almost surely, 2^198922823 is an apocalyptic number.

198922823 is a deficient number, since it is larger than the sum of its proper divisors (18194233).

198922823 is a wasteful number, since it uses less digits than its factorization.

198922823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9205.

The product of its digits is 124416, while the sum is 44.

The square root of 198922823 is about 14104.0002481565. Note that the first 3 decimals coincide. The cubic root of 198922823 is about 583.7517622263.

The spelling of 198922823 in words is "one hundred ninety-eight million, nine hundred twenty-two thousand, eight hundred twenty-three".