891329 has 2 divisors, whose sum is σ = 891330. Its totient is φ = 891328.

The previous prime is 891323. The next prime is 891349. The reversal of 891329 is 923198.

891329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 719104 + 172225 = 848^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 891329 - 2¹² = 887233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 891295 and 891304.

It is not a weakly prime, because it can be changed into another prime (891323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445664 + 445665.

It is an arithmetic number, because the mean of its divisors is an integer number (445665).

2⁸⁹¹³²⁹ is an apocalyptic number.

It is an amenable number.

891329 is a deficient number, since it is larger than the sum of its proper divisors (1).

891329 is an equidigital number, since it uses as much as digits as its factorization.

891329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 891329 is about 944.1022190420. The cubic root of 891329 is about 96.2378721999.

The spelling of 891329 in words is "eight hundred ninety-one thousand, three hundred twenty-nine".