881611 has 2 divisors, whose sum is σ = 881612. Its totient is φ = 881610.

The previous prime is 881597. The next prime is 881641. The reversal of 881611 is 116188.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 881611 - 2⁹ = 881099 is a prime.

It is not a weakly prime, because it can be changed into another prime (881641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440805 + 440806.

It is an arithmetic number, because the mean of its divisors is an integer number (440806).

2⁸⁸¹⁶¹¹ is an apocalyptic number.

881611 is a deficient number, since it is larger than the sum of its proper divisors (1).

881611 is an equidigital number, since it uses as much as digits as its factorization.

881611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 25.

The square root of 881611 is about 938.9414252231. The cubic root of 881611 is about 95.8868385946.

Adding to 881611 its reverse (116188), we get a palindrome (997799).

The spelling of 881611 in words is "eight hundred eighty-one thousand, six hundred eleven".