320972306905 has 4 divisors (see below), whose sum is σ = 385166768292. Its totient is φ = 256777845520.

The previous prime is 320972306903. The next prime is 320972306911. The reversal of 320972306905 is 509603279023.

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 85335847129 + 235636459776 = 292123^2 + 485424^2 .

It is not a de Polignac number, because 320972306905 - 2¹ = 320972306903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320972306903) 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, 32097230686 + ... + 32097230695.

It is an arithmetic number, because the mean of its divisors is an integer number (96291692073).

Almost surely, 2^320972306905 is an apocalyptic number.

It is an amenable number.

320972306905 is a deficient number, since it is larger than the sum of its proper divisors (64194461387).

320972306905 is an equidigital number, since it uses as much as digits as its factorization.

320972306905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64194461386.

The product of its (nonzero) digits is 612360, while the sum is 46.

The spelling of 320972306905 in words is "three hundred twenty billion, nine hundred seventy-two million, three hundred six thousand, nine hundred five".