451998199 has 2 divisors, whose sum is σ = 451998200. Its totient is φ = 451998198.

The previous prime is 451998187. The next prime is 451998229. The reversal of 451998199 is 991899154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451998199 - 2⁹ = 451997687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451992199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225999099 + 225999100.

It is an arithmetic number, because the mean of its divisors is an integer number (225999100).

Almost surely, 2^451998199 is an apocalyptic number.

451998199 is a deficient number, since it is larger than the sum of its proper divisors (1).

451998199 is an equidigital number, since it uses as much as digits as its factorization.

451998199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 55.

The square root of 451998199 is about 21260.2492694700. The cubic root of 451998199 is about 767.4420085840.

The spelling of 451998199 in words is "four hundred fifty-one million, nine hundred ninety-eight thousand, one hundred ninety-nine".