328970531 has 4 divisors (see below), whose sum is σ = 335969952. Its totient is φ = 321971112.

The previous prime is 328970527. The next prime is 328970533. The reversal of 328970531 is 135079823.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 328970531 - 2² = 328970527 is a prime.

It is a super-2 number, since 2×328970531² = 216443220532843922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328970533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3499640 + ... + 3499733.

It is an arithmetic number, because the mean of its divisors is an integer number (83992488).

Almost surely, 2^328970531 is an apocalyptic number.

328970531 is a deficient number, since it is larger than the sum of its proper divisors (6999421).

328970531 is an equidigital number, since it uses as much as digits as its factorization.

328970531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999420.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 328970531 is about 18137.5447897448. The cubic root of 328970531 is about 690.3229818872.

The spelling of 328970531 in words is "three hundred twenty-eight million, nine hundred seventy thousand, five hundred thirty-one".