320949481 has 2 divisors, whose sum is σ = 320949482. Its totient is φ = 320949480.

The previous prime is 320949449. The next prime is 320949491. The reversal of 320949481 is 184949023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284225881 + 36723600 = 16859^2 + 6060^2 .

It is a cyclic number.

It is not a de Polignac number, because 320949481 - 2⁵ = 320949449 is a prime.

It is a super-2 number, since 2×320949481² = 206017138708338722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320949401) by changing a digit.

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 as a sum of consecutive naturals, namely, 160474740 + 160474741.

It is an arithmetic number, because the mean of its divisors is an integer number (160474741).

Almost surely, 2^320949481 is an apocalyptic number.

It is an amenable number.

320949481 is a deficient number, since it is larger than the sum of its proper divisors (1).

320949481 is an equidigital number, since it uses as much as digits as its factorization.

320949481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 320949481 is about 17915.0629638860. The cubic root of 320949481 is about 684.6662063849. Note that the first 3 decimals are identical.

The spelling of 320949481 in words is "three hundred twenty million, nine hundred forty-nine thousand, four hundred eighty-one".