198503491 has 2 divisors, whose sum is σ = 198503492. Its totient is φ = 198503490.

The previous prime is 198503477. The next prime is 198503527. The reversal of 198503491 is 194305891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198503491 - 2⁹ = 198502979 is a prime.

It is not a weakly prime, because it can be changed into another prime (198503401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99251745 + 99251746.

It is an arithmetic number, because the mean of its divisors is an integer number (99251746).

Almost surely, 2^198503491 is an apocalyptic number.

198503491 is a deficient number, since it is larger than the sum of its proper divisors (1).

198503491 is an equidigital number, since it uses as much as digits as its factorization.

198503491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 198503491 is about 14089.1266940148. The cubic root of 198503491 is about 583.3412881273.

The spelling of 198503491 in words is "one hundred ninety-eight million, five hundred three thousand, four hundred ninety-one".