320605349 has 4 divisors (see below), whose sum is σ = 334544736. Its totient is φ = 306665964.

The previous prime is 320605279. The next prime is 320605367. The reversal of 320605349 is 943506023.

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 an emirpimes, since its reverse is a distinct semiprime: 943506023 = 23 ⋅41022001.

It is a cyclic number.

It is not a de Polignac number, because 320605349 - 2²⁸ = 52169893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320605049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6969659 + ... + 6969704.

It is an arithmetic number, because the mean of its divisors is an integer number (83636184).

Almost surely, 2^320605349 is an apocalyptic number.

It is an amenable number.

320605349 is a deficient number, since it is larger than the sum of its proper divisors (13939387).

320605349 is a wasteful number, since it uses less digits than its factorization.

320605349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13939386.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 320605349 is about 17905.4558445185. The cubic root of 320605349 is about 684.4214120828.

The spelling of 320605349 in words is "three hundred twenty million, six hundred five thousand, three hundred forty-nine".