881809 has 4 divisors (see below), whose sum is σ = 928240. Its totient is φ = 835380.

The previous prime is 881779. The next prime is 881813. The reversal of 881809 is 908188.

881809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 881809 - 2⁷ = 881681 is a prime.

It is a super-2 number, since 2×881809² = 1555174224962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (881849) 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, 23187 + ... + 23224.

It is an arithmetic number, because the mean of its divisors is an integer number (232060).

2⁸⁸¹⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

881809 is a deficient number, since it is larger than the sum of its proper divisors (46431).

881809 is a wasteful number, since it uses less digits than its factorization.

881809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46430.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 881809 is about 939.0468571908. The cubic root of 881809 is about 95.8940164289.

The spelling of 881809 in words is "eight hundred eighty-one thousand, eight hundred nine".