881609 has 4 divisors (see below), whose sum is σ = 910080. Its totient is φ = 853140.

The previous prime is 881597. The next prime is 881611. The reversal of 881609 is 906188.

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 a de Polignac number, because none of the positive numbers 2^k-881609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (881669) 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, 14189 + ... + 14250.

It is an arithmetic number, because the mean of its divisors is an integer number (227520).

2⁸⁸¹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

881609 is a deficient number, since it is larger than the sum of its proper divisors (28471).

881609 is a wasteful number, since it uses less digits than its factorization.

881609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28470.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 881609 is about 938.9403601933. The cubic root of 881609 is about 95.8867660858.

The spelling of 881609 in words is "eight hundred eighty-one thousand, six hundred nine".