321424109 has 2 divisors, whose sum is σ = 321424110. Its totient is φ = 321424108.

The previous prime is 321424099. The next prime is 321424193. The reversal of 321424109 is 901424123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268861609 + 52562500 = 16397^2 + 7250^2 .

It is a cyclic number.

It is not a de Polignac number, because 321424109 - 2¹⁶ = 321358573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321426109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160712054 + 160712055.

It is an arithmetic number, because the mean of its divisors is an integer number (160712055).

Almost surely, 2^321424109 is an apocalyptic number.

It is an amenable number.

321424109 is a deficient number, since it is larger than the sum of its proper divisors (1).

321424109 is an equidigital number, since it uses as much as digits as its factorization.

321424109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 321424109 is about 17928.3046883971. The cubic root of 321424109 is about 685.0035405717.

The spelling of 321424109 in words is "three hundred twenty-one million, four hundred twenty-four thousand, one hundred nine".