898561 has 2 divisors, whose sum is σ = 898562. Its totient is φ = 898560.

The previous prime is 898553. The next prime is 898607. The reversal of 898561 is 165898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 24336 = 935^2 + 156^2 .

It is a cyclic number.

It is not a de Polignac number, because 898561 - 2³ = 898553 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 898561.

It is not a weakly prime, because it can be changed into another prime (898361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449280 + 449281.

It is an arithmetic number, because the mean of its divisors is an integer number (449281).

2⁸⁹⁸⁵⁶¹ is an apocalyptic number.

It is an amenable number.

898561 is a deficient number, since it is larger than the sum of its proper divisors (1).

898561 is an equidigital number, since it uses as much as digits as its factorization.

898561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 37.

The square root of 898561 is about 947.9245750586. The cubic root of 898561 is about 96.4974540032.

The spelling of 898561 in words is "eight hundred ninety-eight thousand, five hundred sixty-one".