321445427 has 2 divisors, whose sum is σ = 321445428. Its totient is φ = 321445426.

The previous prime is 321445379. The next prime is 321445433. The reversal of 321445427 is 724544123.

It is a strong prime.

It is an emirp because it is prime and its reverse (724544123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321445427 - 2¹² = 321441331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321445393 and 321445402.

It is not a weakly prime, because it can be changed into another prime (321445457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160722713 + 160722714.

It is an arithmetic number, because the mean of its divisors is an integer number (160722714).

Almost surely, 2^321445427 is an apocalyptic number.

321445427 is a deficient number, since it is larger than the sum of its proper divisors (1).

321445427 is an equidigital number, since it uses as much as digits as its factorization.

321445427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 32.

The square root of 321445427 is about 17928.8992132813. The cubic root of 321445427 is about 685.0186842010.

The spelling of 321445427 in words is "three hundred twenty-one million, four hundred forty-five thousand, four hundred twenty-seven".