320713249 has 4 divisors (see below), whose sum is σ = 320753664. Its totient is φ = 320672836.

The previous prime is 320713247. The next prime is 320713271. The reversal of 320713249 is 942317023.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 320713249 - 2¹ = 320713247 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 320713249.

It is not an unprimeable number, because it can be changed into a prime (320713241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3937 + ... + 25630.

It is an arithmetic number, because the mean of its divisors is an integer number (80188416).

Almost surely, 2^320713249 is an apocalyptic number.

It is an amenable number.

320713249 is a deficient number, since it is larger than the sum of its proper divisors (40415).

320713249 is a wasteful number, since it uses less digits than its factorization.

320713249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40414.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 320713249 is about 17908.4686391662. The cubic root of 320713249 is about 684.4981843383.

The spelling of 320713249 in words is "three hundred twenty million, seven hundred thirteen thousand, two hundred forty-nine".