198364621 has 8 divisors (see below), whose sum is σ = 244141184. Its totient is φ = 156947760.

The previous prime is 198364613. The next prime is 198364657. The reversal of 198364621 is 126463891.

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 198364621 - 2³ = 198364613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198364681) 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, 1089825 + ... + 1090006.

It is an arithmetic number, because the mean of its divisors is an integer number (30517648).

Almost surely, 2^198364621 is an apocalyptic number.

It is an amenable number.

198364621 is a deficient number, since it is larger than the sum of its proper divisors (45776563).

198364621 is a wasteful number, since it uses less digits than its factorization.

198364621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179851.

The product of its digits is 62208, while the sum is 40.

The square root of 198364621 is about 14084.1975632267. The cubic root of 198364621 is about 583.2052241847.

The spelling of 198364621 in words is "one hundred ninety-eight million, three hundred sixty-four thousand, six hundred twenty-one".