320396777 has 2 divisors, whose sum is σ = 320396778. Its totient is φ = 320396776.

The previous prime is 320396771. The next prime is 320396779. The reversal of 320396777 is 777693023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224670121 + 95726656 = 14989^2 + 9784^2 .

It is a cyclic number.

It is not a de Polignac number, because 320396777 - 2⁸ = 320396521 is a prime.

Together with 320396779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320396771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160198388 + 160198389.

It is an arithmetic number, because the mean of its divisors is an integer number (160198389).

Almost surely, 2^320396777 is an apocalyptic number.

It is an amenable number.

320396777 is a deficient number, since it is larger than the sum of its proper divisors (1).

320396777 is an equidigital number, since it uses as much as digits as its factorization.

320396777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 333396, while the sum is 44.

The square root of 320396777 is about 17899.6306386473. The cubic root of 320396777 is about 684.2729615446.

The spelling of 320396777 in words is "three hundred twenty million, three hundred ninety-six thousand, seven hundred seventy-seven".