198274459 has 4 divisors (see below), whose sum is σ = 199370080. Its totient is φ = 197178840.

The previous prime is 198274457. The next prime is 198274469. The reversal of 198274459 is 954472891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954472891 = 10657 ⋅89563.

It is a cyclic number.

It is not a de Polignac number, because 198274459 - 2¹ = 198274457 is a prime.

It is a super-2 number, since 2×198274459² = 78625522183485362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198274457) 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, 547539 + ... + 547900.

It is an arithmetic number, because the mean of its divisors is an integer number (49842520).

Almost surely, 2^198274459 is an apocalyptic number.

198274459 is a deficient number, since it is larger than the sum of its proper divisors (1095621).

198274459 is a wasteful number, since it uses less digits than its factorization.

198274459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095620.

The product of its digits is 725760, while the sum is 49.

The square root of 198274459 is about 14080.9963780977. The cubic root of 198274459 is about 583.1168500282.

The spelling of 198274459 in words is "one hundred ninety-eight million, two hundred seventy-four thousand, four hundred fifty-nine".