889921 has 2 divisors, whose sum is σ = 889922. Its totient is φ = 889920.

The previous prime is 889909. The next prime is 889937. The reversal of 889921 is 129988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505521 + 384400 = 711^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 889921 - 2¹³ = 881729 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (889901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444960 + 444961.

It is an arithmetic number, because the mean of its divisors is an integer number (444961).

2⁸⁸⁹⁹²¹ is an apocalyptic number.

It is an amenable number.

889921 is a deficient number, since it is larger than the sum of its proper divisors (1).

889921 is an equidigital number, since it uses as much as digits as its factorization.

889921 is an evil number, because the sum of its binary digits is even.

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

The square root of 889921 is about 943.3562423602. The cubic root of 889921 is about 96.1871710049.

The spelling of 889921 in words is "eight hundred eighty-nine thousand, nine hundred twenty-one".