320797779 has 8 divisors (see below), whose sum is σ = 427814352. Its totient is φ = 213823200.

The previous prime is 320797747. The next prime is 320797783. The reversal of 320797779 is 977797023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320797779 - 2⁵ = 320797747 is a prime.

It is a super-2 number, since 2×320797779² = 205822430022665682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320795779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19929 + ... + 32229.

It is an arithmetic number, because the mean of its divisors is an integer number (53476794).

Almost surely, 2^320797779 is an apocalyptic number.

320797779 is a deficient number, since it is larger than the sum of its proper divisors (107016573).

320797779 is a wasteful number, since it uses less digits than its factorization.

320797779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20997.

The product of its (nonzero) digits is 1166886, while the sum is 51.

The square root of 320797779 is about 17910.8285402993. The cubic root of 320797779 is about 684.5583165062.

The spelling of 320797779 in words is "three hundred twenty million, seven hundred ninety-seven thousand, seven hundred seventy-nine".