321422407 has 2 divisors, whose sum is σ = 321422408. Its totient is φ = 321422406.

The previous prime is 321422389. The next prime is 321422459. The reversal of 321422407 is 704224123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321422407 - 2⁷ = 321422279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321426407) 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, 160711203 + 160711204.

It is an arithmetic number, because the mean of its divisors is an integer number (160711204).

Almost surely, 2^321422407 is an apocalyptic number.

321422407 is a deficient number, since it is larger than the sum of its proper divisors (1).

321422407 is an equidigital number, since it uses as much as digits as its factorization.

321422407 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 321422407 is about 17928.2572214926. The cubic root of 321422407 is about 685.0023314961.

The spelling of 321422407 in words is "three hundred twenty-one million, four hundred twenty-two thousand, four hundred seven".