320730769 has 2 divisors, whose sum is σ = 320730770. Its totient is φ = 320730768.

The previous prime is 320730727. The next prime is 320730779. The reversal of 320730769 is 967037023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285779025 + 34951744 = 16905^2 + 5912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320730769 is a prime.

It is a super-2 number, since 2×320730769² = 205736452366662722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320730779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160365384 + 160365385.

It is an arithmetic number, because the mean of its divisors is an integer number (160365385).

Almost surely, 2^320730769 is an apocalyptic number.

It is an amenable number.

320730769 is a deficient number, since it is larger than the sum of its proper divisors (1).

320730769 is an equidigital number, since it uses as much as digits as its factorization.

320730769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 37.

The square root of 320730769 is about 17908.9577865380. The cubic root of 320730769 is about 684.5106484215.

The spelling of 320730769 in words is "three hundred twenty million, seven hundred thirty thousand, seven hundred sixty-nine".