320787399 has 12 divisors (see below), whose sum is σ = 454357544. Its totient is φ = 201277824.

The previous prime is 320787377. The next prime is 320787419. The reversal of 320787399 is 993787023.

It is not a de Polignac number, because 320787399 - 2⁵ = 320787367 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 (320787359) 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 11 ways as a sum of consecutive naturals, for example, 184132 + ... + 185865.

Almost surely, 2^320787399 is an apocalyptic number.

320787399 is a deficient number, since it is larger than the sum of its proper divisors (133570145).

320787399 is a wasteful number, since it uses less digits than its factorization.

320787399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370034 (or 370017 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 48.

The square root of 320787399 is about 17910.5387691158. The cubic root of 320787399 is about 684.5509330470.

The spelling of 320787399 in words is "three hundred twenty million, seven hundred eighty-seven thousand, three hundred ninety-nine".