881729 has 2 divisors, whose sum is σ = 881730. Its totient is φ = 881728.

The previous prime is 881711. The next prime is 881743. The reversal of 881729 is 927188.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739600 + 142129 = 860^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 881729 - 2⁸ = 881473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (881779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440864 + 440865.

It is an arithmetic number, because the mean of its divisors is an integer number (440865).

2⁸⁸¹⁷²⁹ is an apocalyptic number.

It is an amenable number.

881729 is a deficient number, since it is larger than the sum of its proper divisors (1).

881729 is an equidigital number, since it uses as much as digits as its factorization.

881729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 35.

The square root of 881729 is about 939.0042598412. The cubic root of 881729 is about 95.8911164232.

The spelling of 881729 in words is "eight hundred eighty-one thousand, seven hundred twenty-nine".