891017 has 2 divisors, whose sum is σ = 891018. Its totient is φ = 891016.

The previous prime is 891001. The next prime is 891047. The reversal of 891017 is 710198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781456 + 109561 = 884^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 891017 - 2⁴ = 891001 is a prime.

It is a super-2 number, since 2×891017² = 1587822588578, which contains 22 as substring.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891017.

It is not a weakly prime, because it can be changed into another prime (891047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445508 + 445509.

It is an arithmetic number, because the mean of its divisors is an integer number (445509).

2⁸⁹¹⁰¹⁷ is an apocalyptic number.

It is an amenable number.

891017 is a deficient number, since it is larger than the sum of its proper divisors (1).

891017 is an equidigital number, since it uses as much as digits as its factorization.

891017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 891017 is about 943.9369682346. The cubic root of 891017 is about 96.2266418835.

The spelling of 891017 in words is "eight hundred ninety-one thousand, seventeen".