198481491 has 12 divisors (see below), whose sum is σ = 308749168. Its totient is φ = 122142384.

The previous prime is 198481489. The next prime is 198481501. The reversal of 198481491 is 194184891.

198481491 is a `hidden beast` number, since 1 + 9 + 84 + 81 + 491 = 666.

It is not a de Polignac number, because 198481491 - 2¹ = 198481489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198481411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 848095 + ... + 848328.

Almost surely, 2^198481491 is an apocalyptic number.

198481491 is a deficient number, since it is larger than the sum of its proper divisors (110267677).

198481491 is a wasteful number, since it uses less digits than its factorization.

198481491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696442 (or 1696439 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 198481491 is about 14088.3459284616. The cubic root of 198481491 is about 583.3197368985.

It can be divided in two parts, 19848149 and 1, that added together give a triangular number (19848150 = T₆₃₀₀).

The spelling of 198481491 in words is "one hundred ninety-eight million, four hundred eighty-one thousand, four hundred ninety-one".