810199059 has 4 divisors (see below), whose sum is σ = 1080265416. Its totient is φ = 540132704.

The previous prime is 810199057. The next prime is 810199063. The reversal of 810199059 is 950991018.

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

It is a cyclic number.

It is not a de Polignac number, because 810199059 - 2¹ = 810199057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 810199059.

It is not an unprimeable number, because it can be changed into a prime (810199057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135033174 + ... + 135033179.

It is an arithmetic number, because the mean of its divisors is an integer number (270066354).

Almost surely, 2^810199059 is an apocalyptic number.

810199059 is a deficient number, since it is larger than the sum of its proper divisors (270066357).

810199059 is a wasteful number, since it uses less digits than its factorization.

810199059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270066356.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 810199059 is about 28463.9958368462. The cubic root of 810199059 is about 932.2461063460.

The spelling of 810199059 in words is "eight hundred ten million, one hundred ninety-nine thousand, fifty-nine".