198022749 has 8 divisors (see below), whose sum is σ = 279561600. Its totient is φ = 124249536.

The previous prime is 198022729. The next prime is 198022751. The reversal of 198022749 is 947220891.

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

It is not a de Polignac number, because 198022749 - 2⁵ = 198022717 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 198022749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198022729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941349 + ... + 1941450.

It is an arithmetic number, because the mean of its divisors is an integer number (34945200).

Almost surely, 2^198022749 is an apocalyptic number.

It is an amenable number.

198022749 is a deficient number, since it is larger than the sum of its proper divisors (81538851).

198022749 is a wasteful number, since it uses less digits than its factorization.

198022749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882819.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 198022749 is about 14072.0556067690. The cubic root of 198022749 is about 582.8699893585.

The spelling of 198022749 in words is "one hundred ninety-eight million, twenty-two thousand, seven hundred forty-nine".