320771945 has 16 divisors (see below), whose sum is σ = 423360000. Its totient is φ = 231835584.

The previous prime is 320771939. The next prime is 320771989. The reversal of 320771945 is 549177023.

It is not a de Polignac number, because 320771945 - 2²⁴ = 303994729 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320771899 and 320771908.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49445 + ... + 55554.

It is an arithmetic number, because the mean of its divisors is an integer number (26460000).

Almost surely, 2^320771945 is an apocalyptic number.

It is an amenable number.

320771945 is a deficient number, since it is larger than the sum of its proper divisors (102588055).

320771945 is a wasteful number, since it uses less digits than its factorization.

320771945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105064.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 320771945 is about 17910.1073419452. The cubic root of 320771945 is about 684.5399400757.

The spelling of 320771945 in words is "three hundred twenty million, seven hundred seventy-one thousand, nine hundred forty-five".