80328509 has 4 divisors (see below), whose sum is σ = 80361504. Its totient is φ = 80295516.

The previous prime is 80328491. The next prime is 80328541. The reversal of 80328509 is 90582308.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80328509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80328569) 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, 12527 + ... + 17820.

It is an arithmetic number, because the mean of its divisors is an integer number (20090376).

Almost surely, 2^80328509 is an apocalyptic number.

It is an amenable number.

80328509 is a deficient number, since it is larger than the sum of its proper divisors (32995).

80328509 is a wasteful number, since it uses less digits than its factorization.

80328509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32994.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 80328509 is about 8962.6173074610. The cubic root of 80328509 is about 431.4759251969.

The spelling of 80328509 in words is "eighty million, three hundred twenty-eight thousand, five hundred nine".