328421473 has 2 divisors, whose sum is σ = 328421474. Its totient is φ = 328421472.

The previous prime is 328421461. The next prime is 328421519. The reversal of 328421473 is 374124823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188046369 + 140375104 = 13713^2 + 11848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328421473 is a prime.

It is not a weakly prime, because it can be changed into another prime (328421173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164210736 + 164210737.

It is an arithmetic number, because the mean of its divisors is an integer number (164210737).

Almost surely, 2^328421473 is an apocalyptic number.

It is an amenable number.

328421473 is a deficient number, since it is larger than the sum of its proper divisors (1).

328421473 is an equidigital number, since it uses as much as digits as its factorization.

328421473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 34.

The square root of 328421473 is about 18122.4025173264. The cubic root of 328421473 is about 689.9387140134.

The spelling of 328421473 in words is "three hundred twenty-eight million, four hundred twenty-one thousand, four hundred seventy-three".