328728923 has 2 divisors, whose sum is σ = 328728924. Its totient is φ = 328728922.

The previous prime is 328728863. The next prime is 328728941. The reversal of 328728923 is 329827823.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 328728923 - 2¹² = 328724827 is a prime.

It is not a weakly prime, because it can be changed into another prime (328728523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164364461 + 164364462.

It is an arithmetic number, because the mean of its divisors is an integer number (164364462).

Almost surely, 2^328728923 is an apocalyptic number.

328728923 is a deficient number, since it is larger than the sum of its proper divisors (1).

328728923 is an equidigital number, since it uses as much as digits as its factorization.

328728923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 328728923 is about 18130.8831279670. The cubic root of 328728923 is about 690.1539410081.

The spelling of 328728923 in words is "three hundred twenty-eight million, seven hundred twenty-eight thousand, nine hundred twenty-three".