320694779 has 2 divisors, whose sum is σ = 320694780. Its totient is φ = 320694778.

The previous prime is 320694757. The next prime is 320694793. The reversal of 320694779 is 977496023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320694779 - 2⁸ = 320694523 is a prime.

It is not a weakly prime, because it can be changed into another prime (320694719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160347389 + 160347390.

It is an arithmetic number, because the mean of its divisors is an integer number (160347390).

Almost surely, 2^320694779 is an apocalyptic number.

320694779 is a deficient number, since it is larger than the sum of its proper divisors (1).

320694779 is an equidigital number, since it uses as much as digits as its factorization.

320694779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 47.

The square root of 320694779 is about 17907.9529539252. The cubic root of 320694779 is about 684.4850439143.

The spelling of 320694779 in words is "three hundred twenty million, six hundred ninety-four thousand, seven hundred seventy-nine".