328521607 has 4 divisors (see below), whose sum is σ = 330726600. Its totient is φ = 326316616.

The previous prime is 328521577. The next prime is 328521619. The reversal of 328521607 is 706125823.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328521607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328521667) 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, 1102273 + ... + 1102570.

It is an arithmetic number, because the mean of its divisors is an integer number (82681650).

Almost surely, 2^328521607 is an apocalyptic number.

328521607 is a deficient number, since it is larger than the sum of its proper divisors (2204993).

328521607 is a wasteful number, since it uses less digits than its factorization.

328521607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204992.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 328521607 is about 18125.1650199384. The cubic root of 328521607 is about 690.0088264641.

The spelling of 328521607 in words is "three hundred twenty-eight million, five hundred twenty-one thousand, six hundred seven".