321434389 has 2 divisors, whose sum is σ = 321434390. Its totient is φ = 321434388.

The previous prime is 321434369. The next prime is 321434467. The reversal of 321434389 is 983434123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261371889 + 60062500 = 16167^2 + 7750^2 .

It is a cyclic number.

It is not a de Polignac number, because 321434389 - 2⁷ = 321434261 is a prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321434339) 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, 160717194 + 160717195.

It is an arithmetic number, because the mean of its divisors is an integer number (160717195).

Almost surely, 2^321434389 is an apocalyptic number.

It is an amenable number.

321434389 is a deficient number, since it is larger than the sum of its proper divisors (1).

321434389 is an equidigital number, since it uses as much as digits as its factorization.

321434389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 321434389 is about 17928.5913835973. The cubic root of 321434389 is about 685.0108432404.

The spelling of 321434389 in words is "three hundred twenty-one million, four hundred thirty-four thousand, three hundred eighty-nine".