898691 has 2 divisors, whose sum is σ = 898692. Its totient is φ = 898690.

The previous prime is 898673. The next prime is 898717. The reversal of 898691 is 196898.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 898691 - 2¹⁸ = 636547 is a prime.

It is not a weakly prime, because it can be changed into another prime (898621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449345 + 449346.

It is an arithmetic number, because the mean of its divisors is an integer number (449346).

2⁸⁹⁸⁶⁹¹ is an apocalyptic number.

898691 is a deficient number, since it is larger than the sum of its proper divisors (1).

898691 is an equidigital number, since it uses as much as digits as its factorization.

898691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 898691 is about 947.9931434351. The cubic root of 898691 is about 96.5021073931.

The spelling of 898691 in words is "eight hundred ninety-eight thousand, six hundred ninety-one".