328686433 has 2 divisors, whose sum is σ = 328686434. Its totient is φ = 328686432.

The previous prime is 328686383. The next prime is 328686461. The reversal of 328686433 is 334686823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 327899664 + 786769 = 18108^2 + 887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328686433 is a prime.

It is equal to p_17718397 and since 328686433 and 17718397 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328686433.

It is not a weakly prime, because it can be changed into another prime (328686473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164343216 + 164343217.

It is an arithmetic number, because the mean of its divisors is an integer number (164343217).

Almost surely, 2^328686433 is an apocalyptic number.

It is an amenable number.

328686433 is a deficient number, since it is larger than the sum of its proper divisors (1).

328686433 is an equidigital number, since it uses as much as digits as its factorization.

328686433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 43.

The square root of 328686433 is about 18129.7113325061. The cubic root of 328686433 is about 690.1242043442.

The spelling of 328686433 in words is "three hundred twenty-eight million, six hundred eighty-six thousand, four hundred thirty-three".