805553 has 4 divisors (see below), whose sum is σ = 920640. Its totient is φ = 690468.

The previous prime is 805537. The next prime is 805559. The reversal of 805553 is 355508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 805553 - 2⁴ = 805537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (805559) 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, 57533 + ... + 57546.

It is an arithmetic number, because the mean of its divisors is an integer number (230160).

2⁸⁰⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

805553 is a deficient number, since it is larger than the sum of its proper divisors (115087).

805553 is a wasteful number, since it uses less digits than its factorization.

805553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115086.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 805553 is about 897.5260441904. The cubic root of 805553 is about 93.0460711339.

The spelling of 805553 in words is "eight hundred five thousand, five hundred fifty-three".