321020969 has 2 divisors, whose sum is σ = 321020970. Its totient is φ = 321020968.

The previous prime is 321020963. The next prime is 321020971. The reversal of 321020969 is 969020123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303212569 + 17808400 = 17413^2 + 4220^2 .

It is a cyclic number.

It is not a de Polignac number, because 321020969 - 2²⁸ = 52585513 is a prime.

It is a super-2 number, since 2×321020969² = 206108925075397922, which contains 22 as substring.

Together with 321020971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (321020963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160510484 + 160510485.

It is an arithmetic number, because the mean of its divisors is an integer number (160510485).

Almost surely, 2^321020969 is an apocalyptic number.

It is an amenable number.

321020969 is a deficient number, since it is larger than the sum of its proper divisors (1).

321020969 is an equidigital number, since it uses as much as digits as its factorization.

321020969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 321020969 is about 17917.0580453377. The cubic root of 321020969 is about 684.7170365903.

The spelling of 321020969 in words is "three hundred twenty-one million, twenty thousand, nine hundred sixty-nine".