198024901 has 4 divisors (see below), whose sum is σ = 198053100. Its totient is φ = 197996704.

The previous prime is 198024839. The next prime is 198024949. The reversal of 198024901 is 109420891.

198024901 = 9950² + 9951².

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 99002500 + 99022401 = 9950^2 + 9951^2 .

It is a cyclic number.

It is not a de Polignac number, because 198024901 - 2¹⁹ = 197500613 is a prime.

It is a super-2 number, since 2×198024901² = 78427722832119602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198024601) 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 3 ways as a sum of consecutive naturals, for example, 5745 + ... + 20713.

It is an arithmetic number, because the mean of its divisors is an integer number (49513275).

Almost surely, 2^198024901 is an apocalyptic number.

198024901 is the 9951-st centered square number.

It is an amenable number.

198024901 is a deficient number, since it is larger than the sum of its proper divisors (28199).

198024901 is a wasteful number, since it uses less digits than its factorization.

198024901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28198.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 198024901 is about 14072.1320701591. The cubic root of 198024901 is about 582.8721007854.

The spelling of 198024901 in words is "one hundred ninety-eight million, twenty-four thousand, nine hundred one".