199019454 has 16 divisors (see below), whose sum is σ = 404564880. Its totient is φ = 65252160.

The previous prime is 199019441. The next prime is 199019497. The reversal of 199019454 is 454910991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 271519 + ... + 272250.

It is an arithmetic number, because the mean of its divisors is an integer number (25285305).

Almost surely, 2^199019454 is an apocalyptic number.

199019454 is an abundant number, since it is smaller than the sum of its proper divisors (205545426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199019454 is a wasteful number, since it uses less digits than its factorization.

199019454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543835.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 199019454 is about 14107.4254915629. The cubic root of 199019454 is about 583.8462702106.

The spelling of 199019454 in words is "one hundred ninety-nine million, nineteen thousand, four hundred fifty-four".