320043869 has 2 divisors, whose sum is σ = 320043870. Its totient is φ = 320043868.

The previous prime is 320043863. The next prime is 320043901. The reversal of 320043869 is 968340023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304083844 + 15960025 = 17438^2 + 3995^2 .

It is a cyclic number.

It is not a de Polignac number, because 320043869 - 2⁸ = 320043613 is a prime.

It is a super-2 number, since 2×320043869² = 204856156168978322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320043863) 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 as a sum of consecutive naturals, namely, 160021934 + 160021935.

It is an arithmetic number, because the mean of its divisors is an integer number (160021935).

Almost surely, 2^320043869 is an apocalyptic number.

It is an amenable number.

320043869 is a deficient number, since it is larger than the sum of its proper divisors (1).

320043869 is an equidigital number, since it uses as much as digits as its factorization.

320043869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 320043869 is about 17889.7699538032. The cubic root of 320043869 is about 684.0216334653.

The spelling of 320043869 in words is "three hundred twenty million, forty-three thousand, eight hundred sixty-nine".