320496905 has 4 divisors (see below), whose sum is σ = 384596292. Its totient is φ = 256397520.

The previous prime is 320496853. The next prime is 320496919. The reversal of 320496905 is 509694023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509694023 = 2713 ⋅187871.

It can be written as a sum of positive squares in 2 ways, for example, as 86192656 + 234304249 = 9284^2 + 15307^2 .

It is a de Polignac number, because none of the positive numbers 2^k-320496905 is a prime.

It is a super-2 number, since 2×320496905² = 205436532229158050, which contains 22 as substring.

It is a Duffinian number.

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, 32049686 + ... + 32049695.

It is an arithmetic number, because the mean of its divisors is an integer number (96149073).

Almost surely, 2^320496905 is an apocalyptic number.

It is an amenable number.

320496905 is a deficient number, since it is larger than the sum of its proper divisors (64099387).

320496905 is an equidigital number, since it uses as much as digits as its factorization.

320496905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64099386.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 320496905 is about 17902.4273493848. The cubic root of 320496905 is about 684.3442354067.

The spelling of 320496905 in words is "three hundred twenty million, four hundred ninety-six thousand, nine hundred five".