321642029 has 2 divisors, whose sum is σ = 321642030. Its totient is φ = 321642028.

The previous prime is 321641993. The next prime is 321642049. The reversal of 321642029 is 920246123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278055625 + 43586404 = 16675^2 + 6602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321642029 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 321641992 and 321642010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321642049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160821014 + 160821015.

It is an arithmetic number, because the mean of its divisors is an integer number (160821015).

Almost surely, 2^321642029 is an apocalyptic number.

It is an amenable number.

321642029 is a deficient number, since it is larger than the sum of its proper divisors (1).

321642029 is an equidigital number, since it uses as much as digits as its factorization.

321642029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 321642029 is about 17934.3811992497. The cubic root of 321642029 is about 685.1583124598.

The spelling of 321642029 in words is "three hundred twenty-one million, six hundred forty-two thousand, twenty-nine".