891287 has 2 divisors, whose sum is σ = 891288. Its totient is φ = 891286.

The previous prime is 891277. The next prime is 891311. The reversal of 891287 is 782198.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 891287 - 2⁶ = 891223 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891287.

It is not a weakly prime, because it can be changed into another prime (891277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445643 + 445644.

It is an arithmetic number, because the mean of its divisors is an integer number (445644).

2⁸⁹¹²⁸⁷ is an apocalyptic number.

891287 is a deficient number, since it is larger than the sum of its proper divisors (1).

891287 is an equidigital number, since it uses as much as digits as its factorization.

891287 is an evil number, because the sum of its binary digits is even.

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

The square root of 891287 is about 944.0799754258. The cubic root of 891287 is about 96.2363605792.

The spelling of 891287 in words is "eight hundred ninety-one thousand, two hundred eighty-seven".