851099 has 4 divisors (see below), whose sum is σ = 870936. Its totient is φ = 831264.

The previous prime is 851093. The next prime is 851113. The reversal of 851099 is 990158.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9854 + ... + 9939.

It is an arithmetic number, because the mean of its divisors is an integer number (217734).

2⁸⁵¹⁰⁹⁹ is an apocalyptic number.

851099 is a deficient number, since it is larger than the sum of its proper divisors (19837).

851099 is a wasteful number, since it uses less digits than its factorization.

851099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19836.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 851099 is about 922.5502696330. The cubic root of 851099 is about 94.7676315399.

The spelling of 851099 in words is "eight hundred fifty-one thousand, ninety-nine".