881009 has 2 divisors, whose sum is σ = 881010. Its totient is φ = 881008.

The previous prime is 881003. The next prime is 881017. The reversal of 881009 is 900188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462400 + 418609 = 680^2 + 647^2 .

It is a cyclic number.

It is not a de Polignac number, because 881009 - 2⁴ = 880993 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 881009.

It is not a weakly prime, because it can be changed into another prime (881003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440504 + 440505.

It is an arithmetic number, because the mean of its divisors is an integer number (440505).

2⁸⁸¹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

881009 is a deficient number, since it is larger than the sum of its proper divisors (1).

881009 is an equidigital number, since it uses as much as digits as its factorization.

881009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 881009 is about 938.6207967012. The cubic root of 881009 is about 95.8650084751.

The spelling of 881009 in words is "eight hundred eighty-one thousand, nine".