321204427 has 2 divisors, whose sum is σ = 321204428. Its totient is φ = 321204426.

The previous prime is 321204419. The next prime is 321204451. The reversal of 321204427 is 724402123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321204427 - 2³ = 321204419 is a prime.

It is not a weakly prime, because it can be changed into another prime (321204227) 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, 160602213 + 160602214.

It is an arithmetic number, because the mean of its divisors is an integer number (160602214).

Almost surely, 2^321204427 is an apocalyptic number.

321204427 is a deficient number, since it is larger than the sum of its proper divisors (1).

321204427 is an equidigital number, since it uses as much as digits as its factorization.

321204427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 321204427 is about 17922.1769604030. The cubic root of 321204427 is about 684.8474464478.

The spelling of 321204427 in words is "three hundred twenty-one million, two hundred four thousand, four hundred twenty-seven".