320972705 has 16 divisors (see below), whose sum is σ = 402399360. Its totient is φ = 245317248.

The previous prime is 320972693. The next prime is 320972711. The reversal of 320972705 is 507279023.

It is a cyclic number.

It is not a de Polignac number, because 320972705 - 2⁴ = 320972689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166829 + ... + 168741.

It is an arithmetic number, because the mean of its divisors is an integer number (25149960).

Almost surely, 2^320972705 is an apocalyptic number.

It is an amenable number.

320972705 is a deficient number, since it is larger than the sum of its proper divisors (81426655).

320972705 is a wasteful number, since it uses less digits than its factorization.

320972705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 320972705 is about 17915.7111218059. The cubic root of 320972705 is about 684.6827202034.

The spelling of 320972705 in words is "three hundred twenty million, nine hundred seventy-two thousand, seven hundred five".