199954285 has 4 divisors (see below), whose sum is σ = 239945148. Its totient is φ = 159963424.

The previous prime is 199954283. The next prime is 199954297. The reversal of 199954285 is 582459991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101666889 + 98287396 = 10083^2 + 9914^2 .

It is a cyclic number.

It is not a de Polignac number, because 199954285 - 2¹ = 199954283 is a prime.

It is a super-2 number, since 2×199954285² = 79963432179722450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199954283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19995424 + ... + 19995433.

It is an arithmetic number, because the mean of its divisors is an integer number (59986287).

Almost surely, 2^199954285 is an apocalyptic number.

It is an amenable number.

199954285 is a deficient number, since it is larger than the sum of its proper divisors (39990863).

199954285 is an equidigital number, since it uses as much as digits as its factorization.

199954285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39990862.

The product of its digits is 1166400, while the sum is 52.

The square root of 199954285 is about 14140.5192620356. The cubic root of 199954285 is about 584.7589870903.

The spelling of 199954285 in words is "one hundred ninety-nine million, nine hundred fifty-four thousand, two hundred eighty-five".