198481951 has 2 divisors, whose sum is σ = 198481952. Its totient is φ = 198481950.

The previous prime is 198481931. The next prime is 198481957. The reversal of 198481951 is 159184891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198481951 - 2²⁵ = 164927519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198481957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99240975 + 99240976.

It is an arithmetic number, because the mean of its divisors is an integer number (99240976).

Almost surely, 2^198481951 is an apocalyptic number.

198481951 is a deficient number, since it is larger than the sum of its proper divisors (1).

198481951 is an equidigital number, since it uses as much as digits as its factorization.

198481951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 46.

The square root of 198481951 is about 14088.3622540024. The cubic root of 198481951 is about 583.3201875314.

The spelling of 198481951 in words is "one hundred ninety-eight million, four hundred eighty-one thousand, nine hundred fifty-one".