328877993 has 2 divisors, whose sum is σ = 328877994. Its totient is φ = 328877992.

The previous prime is 328877987. The next prime is 328878001. The reversal of 328877993 is 399778823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325874704 + 3003289 = 18052^2 + 1733^2 .

It is a cyclic number.

It is not a de Polignac number, because 328877993 - 2⁸ = 328877737 is a prime.

It is not a weakly prime, because it can be changed into another prime (328277993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164438996 + 164438997.

It is an arithmetic number, because the mean of its divisors is an integer number (164438997).

Almost surely, 2^328877993 is an apocalyptic number.

It is an amenable number.

328877993 is a deficient number, since it is larger than the sum of its proper divisors (1).

328877993 is an equidigital number, since it uses as much as digits as its factorization.

328877993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 56.

The square root of 328877993 is about 18134.9936035280. The cubic root of 328877993 is about 690.2582475186.

The spelling of 328877993 in words is "three hundred twenty-eight million, eight hundred seventy-seven thousand, nine hundred ninety-three".