328584391 has 2 divisors, whose sum is σ = 328584392. Its totient is φ = 328584390.

The previous prime is 328584359. The next prime is 328584427. The reversal of 328584391 is 193485823.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 328584391 - 2⁵ = 328584359 is a prime.

It is a super-3 number, since 3×328584391³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328584331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164292195 + 164292196.

It is an arithmetic number, because the mean of its divisors is an integer number (164292196).

Almost surely, 2^328584391 is an apocalyptic number.

328584391 is a deficient number, since it is larger than the sum of its proper divisors (1).

328584391 is an equidigital number, since it uses as much as digits as its factorization.

328584391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 328584391 is about 18126.8968938426. The cubic root of 328584391 is about 690.0527796916.

It can be divided in two parts, 32858 and 4391, that added together give a square (37249 = 193²).

The spelling of 328584391 in words is "three hundred twenty-eight million, five hundred eighty-four thousand, three hundred ninety-one".