198036621 has 24 divisors (see below), whose sum is σ = 313330680. Its totient is φ = 119970816.

The previous prime is 198036599. The next prime is 198036623. The reversal of 198036621 is 126630891.

It can be written as a sum of positive squares in 4 ways, for example, as 95824521 + 102212100 = 9789^2 + 10110^2 .

It is not a de Polignac number, because 198036621 - 2¹⁴ = 198020237 is a prime.

It is a super-3 number, since 3×198036621³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198036623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17880 + ... + 26753.

It is an arithmetic number, because the mean of its divisors is an integer number (13055445).

Almost surely, 2^198036621 is an apocalyptic number.

It is an amenable number.

198036621 is a deficient number, since it is larger than the sum of its proper divisors (115294059).

198036621 is a wasteful number, since it uses less digits than its factorization.

198036621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44685 (or 44682 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 198036621 is about 14072.5484898792. The cubic root of 198036621 is about 582.8835995519.

The spelling of 198036621 in words is "one hundred ninety-eight million, thirty-six thousand, six hundred twenty-one".