199001 has 8 divisors (see below), whose sum is σ = 220800. Its totient is φ = 177840.

The previous prime is 198997. The next prime is 199021. The reversal of 199001 is 100991.

199001 = 19² + 20² + ... + 84².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199001 - 2² = 198997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755 + ... + 983.

It is an arithmetic number, because the mean of its divisors is an integer number (27600).

2¹⁹⁹⁰⁰¹ is an apocalyptic number.

199001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199001 is the 200-th centered decagonal number.

It is an amenable number.

199001 is a deficient number, since it is larger than the sum of its proper divisors (21799).

199001 is a wasteful number, since it uses less digits than its factorization.

199001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 199001 is about 446.0952813021. The cubic root of 199001 is about 58.3828224015.

Adding to 199001 its reverse (100991), we get a palindrome (299992).

The spelling of 199001 in words is "one hundred ninety-nine thousand, one".