321889 has 2 divisors, whose sum is σ = 321890. Its totient is φ = 321888.

The previous prime is 321851. The next prime is 321901. The reversal of 321889 is 988123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 321489 + 400 = 567^2 + 20^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321889 is a prime.

It is a super-2 number, since 2×321889² = 207225056642, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 321889.

It is not a weakly prime, because it can be changed into another prime (321829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160944 + 160945.

It is an arithmetic number, because the mean of its divisors is an integer number (160945).

2³²¹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

321889 is a deficient number, since it is larger than the sum of its proper divisors (1).

321889 is an equidigital number, since it uses as much as digits as its factorization.

321889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 321889 is about 567.3526240355. The cubic root of 321889 is about 68.5333632564.

The spelling of 321889 in words is "three hundred twenty-one thousand, eight hundred eighty-nine".