328939687 has 2 divisors, whose sum is σ = 328939688. Its totient is φ = 328939686.

The previous prime is 328939643. The next prime is 328939693. The reversal of 328939687 is 786939823.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (786939823) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328939687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328939487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164469843 + 164469844.

It is an arithmetic number, because the mean of its divisors is an integer number (164469844).

Almost surely, 2^328939687 is an apocalyptic number.

328939687 is a deficient number, since it is larger than the sum of its proper divisors (1).

328939687 is an equidigital number, since it uses as much as digits as its factorization.

328939687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 55.

The square root of 328939687 is about 18136.6944893495. The cubic root of 328939687 is about 690.3014065124.

The spelling of 328939687 in words is "three hundred twenty-eight million, nine hundred thirty-nine thousand, six hundred eighty-seven".