328912739 has 4 divisors (see below), whose sum is σ = 329984424. Its totient is φ = 327841056.

The previous prime is 328912709. The next prime is 328912747. The reversal of 328912739 is 937219823.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937219823 = 109 ⋅8598347.

It is a cyclic number.

It is not a de Polignac number, because 328912739 - 2²⁸ = 60477283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 328912739.

It is not an unprimeable number, because it can be changed into a prime (328912709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535382 + ... + 535995.

It is an arithmetic number, because the mean of its divisors is an integer number (82496106).

Almost surely, 2^328912739 is an apocalyptic number.

328912739 is a deficient number, since it is larger than the sum of its proper divisors (1071685).

328912739 is a wasteful number, since it uses less digits than its factorization.

328912739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071684.

The product of its digits is 163296, while the sum is 44.

The square root of 328912739 is about 18135.9515603676. The cubic root of 328912739 is about 690.2825552852.

The spelling of 328912739 in words is "three hundred twenty-eight million, nine hundred twelve thousand, seven hundred thirty-nine".