320937145 has 4 divisors (see below), whose sum is σ = 385124580. Its totient is φ = 256749712.

The previous prime is 320937137. The next prime is 320937161. The reversal of 320937145 is 541739023.

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 208831401 + 112105744 = 14451^2 + 10588^2 .

It is a cyclic number.

It is not a de Polignac number, because 320937145 - 2³ = 320937137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320937145.

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 3 ways as a sum of consecutive naturals, for example, 32093710 + ... + 32093719.

It is an arithmetic number, because the mean of its divisors is an integer number (96281145).

Almost surely, 2^320937145 is an apocalyptic number.

It is an amenable number.

320937145 is a deficient number, since it is larger than the sum of its proper divisors (64187435).

320937145 is an equidigital number, since it uses as much as digits as its factorization.

320937145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64187434.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 320937145 is about 17914.7186692954. The cubic root of 320937145 is about 684.6574343392.

The spelling of 320937145 in words is "three hundred twenty million, nine hundred thirty-seven thousand, one hundred forty-five".