329704421 has 2 divisors, whose sum is σ = 329704422. Its totient is φ = 329704420.

The previous prime is 329704381. The next prime is 329704429. The reversal of 329704421 is 124407923.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185368225 + 144336196 = 13615^2 + 12014^2 .

It is an emirp because it is prime and its reverse (124407923) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 329704421 - 2¹⁸ = 329442277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (329704429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164852210 + 164852211.

It is an arithmetic number, because the mean of its divisors is an integer number (164852211).

Almost surely, 2^329704421 is an apocalyptic number.

It is an amenable number.

329704421 is a deficient number, since it is larger than the sum of its proper divisors (1).

329704421 is an equidigital number, since it uses as much as digits as its factorization.

329704421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 329704421 is about 18157.7647578109. The cubic root of 329704421 is about 690.8359405635.

The spelling of 329704421 in words is "three hundred twenty-nine million, seven hundred four thousand, four hundred twenty-one".