898921 has 2 divisors, whose sum is σ = 898922. Its totient is φ = 898920.

The previous prime is 898897. The next prime is 898927. The reversal of 898921 is 129898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 290521 = 780^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 898921 - 2⁵ = 898889 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (898927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449460 + 449461.

It is an arithmetic number, because the mean of its divisors is an integer number (449461).

2⁸⁹⁸⁹²¹ is an apocalyptic number.

It is an amenable number.

898921 is a deficient number, since it is larger than the sum of its proper divisors (1).

898921 is an equidigital number, since it uses as much as digits as its factorization.

898921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 898921 is about 948.1144445688. The cubic root of 898921 is about 96.5103392145.

The spelling of 898921 in words is "eight hundred ninety-eight thousand, nine hundred twenty-one".