198363621 has 8 divisors (see below), whose sum is σ = 264780064. Its totient is φ = 132094800.

The previous prime is 198363619. The next prime is 198363631. The reversal of 198363621 is 126363891.

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

It is not a de Polignac number, because 198363621 - 2¹ = 198363619 is a prime.

It is a super-2 number, since 2×198363621² = 78696252272463282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198363621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198363631) 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, 33730 + ... + 39171.

It is an arithmetic number, because the mean of its divisors is an integer number (33097508).

Almost surely, 2^198363621 is an apocalyptic number.

It is an amenable number.

198363621 is a deficient number, since it is larger than the sum of its proper divisors (66416443).

198363621 is an equidigital number, since it uses as much as digits as its factorization.

198363621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73811.

The product of its digits is 46656, while the sum is 39.

The square root of 198363621 is about 14084.1620624019. The cubic root of 198363621 is about 583.2042441608.

The spelling of 198363621 in words is "one hundred ninety-eight million, three hundred sixty-three thousand, six hundred twenty-one".