320349263 has 4 divisors (see below), whose sum is σ = 344991528. Its totient is φ = 295707000.

The previous prime is 320349259. The next prime is 320349287. The reversal of 320349263 is 362943023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362943023 = 157 ⋅2311739.

It is a cyclic number.

It is not a de Polignac number, because 320349263 - 2² = 320349259 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 (320349233) 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, 12321113 + ... + 12321138.

It is an arithmetic number, because the mean of its divisors is an integer number (86247882).

Almost surely, 2^320349263 is an apocalyptic number.

320349263 is a deficient number, since it is larger than the sum of its proper divisors (24642265).

320349263 is a wasteful number, since it uses less digits than its factorization.

320349263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24642264.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 320349263 is about 17898.3033553463. The cubic root of 320349263 is about 684.2391345784.

The spelling of 320349263 in words is "three hundred twenty million, three hundred forty-nine thousand, two hundred sixty-three".