320049745 has 4 divisors (see below), whose sum is σ = 384059700. Its totient is φ = 256039792.

The previous prime is 320049721. The next prime is 320049767. The reversal of 320049745 is 547940023.

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

It can be written as a sum of positive squares in 2 ways, for example, as 109683729 + 210366016 = 10473^2 + 14504^2 .

It is a cyclic number.

It is not a de Polignac number, because 320049745 - 2¹¹ = 320047697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320049745.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32004970 + ... + 32004979.

It is an arithmetic number, because the mean of its divisors is an integer number (96014925).

Almost surely, 2^320049745 is an apocalyptic number.

It is an amenable number.

320049745 is a deficient number, since it is larger than the sum of its proper divisors (64009955).

320049745 is an equidigital number, since it uses as much as digits as its factorization.

320049745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64009954.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 320049745 is about 17889.9341809857. The cubic root of 320049745 is about 684.0258196482.

Adding to 320049745 its reverse (547940023), we get a palindrome (867989768).

The spelling of 320049745 in words is "three hundred twenty million, forty-nine thousand, seven hundred forty-five".