811087 has 4 divisors (see below), whose sum is σ = 858816. Its totient is φ = 763360.

The previous prime is 811081. The next prime is 811099. The reversal of 811087 is 780118.

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 811087 - 2¹⁵ = 778319 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 (811081) 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, 23839 + ... + 23872.

It is an arithmetic number, because the mean of its divisors is an integer number (214704).

2⁸¹¹⁰⁸⁷ is an apocalyptic number.

811087 is a deficient number, since it is larger than the sum of its proper divisors (47729).

811087 is a wasteful number, since it uses less digits than its factorization.

811087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47728.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 811087 is about 900.6036864237. The cubic root of 811087 is about 93.2586548328.

The spelling of 811087 in words is "eight hundred eleven thousand, eighty-seven".