881681 has 2 divisors, whose sum is σ = 881682. Its totient is φ = 881680.

The previous prime is 881669. The next prime is 881707. The reversal of 881681 is 186188.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801025 + 80656 = 895^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 881681 - 2¹⁸ = 619537 is a prime.

It is a super-2 number, since 2×881681² = 1554722771522, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (881611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440840 + 440841.

It is an arithmetic number, because the mean of its divisors is an integer number (440841).

2⁸⁸¹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

881681 is a deficient number, since it is larger than the sum of its proper divisors (1).

881681 is an equidigital number, since it uses as much as digits as its factorization.

881681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 32.

The square root of 881681 is about 938.9787005039. The cubic root of 881681 is about 95.8893763356.

The spelling of 881681 in words is "eight hundred eighty-one thousand, six hundred eighty-one".