810199 has 4 divisors (see below), whose sum is σ = 872536. Its totient is φ = 747864.

The previous prime is 810193. The next prime is 810209. The reversal of 810199 is 991018.

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

It is not a de Polignac number, because 810199 - 2³ = 810191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810191) 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, 31149 + ... + 31174.

It is an arithmetic number, because the mean of its divisors is an integer number (218134).

2⁸¹⁰¹⁹⁹ is an apocalyptic number.

810199 is a deficient number, since it is larger than the sum of its proper divisors (62337).

810199 is a wasteful number, since it uses less digits than its factorization.

810199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62336.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 810199 is about 900.1105487661. The cubic root of 810199 is about 93.2246083717.

The spelling of 810199 in words is "eight hundred ten thousand, one hundred ninety-nine".