320544779 has 2 divisors, whose sum is σ = 320544780. Its totient is φ = 320544778.

The previous prime is 320544751. The next prime is 320544793. The reversal of 320544779 is 977445023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320544779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320544709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160272389 + 160272390.

It is an arithmetic number, because the mean of its divisors is an integer number (160272390).

Almost surely, 2^320544779 is an apocalyptic number.

320544779 is a deficient number, since it is larger than the sum of its proper divisors (1).

320544779 is an equidigital number, since it uses as much as digits as its factorization.

320544779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 320544779 is about 17903.7643807106. The cubic root of 320544779 is about 684.3783081900.

The spelling of 320544779 in words is "three hundred twenty million, five hundred forty-four thousand, seven hundred seventy-nine".