969643813 has 2 divisors, whose sum is σ = 969643814. Its totient is φ = 969643812.

The previous prime is 969643799. The next prime is 969643837. The reversal of 969643813 is 318346969.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 969512769 + 131044 = 31137^2 + 362^2 .

It is an emirp because it is prime and its reverse (318346969) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 969643813 - 2¹³ = 969635621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (969643613) 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, 484821906 + 484821907.

It is an arithmetic number, because the mean of its divisors is an integer number (484821907).

Almost surely, 2^969643813 is an apocalyptic number.

It is an amenable number.

969643813 is a deficient number, since it is larger than the sum of its proper divisors (1).

969643813 is an equidigital number, since it uses as much as digits as its factorization.

969643813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 49.

The square root of 969643813 is about 31139.1042420941. The cubic root of 969643813 is about 989.7771198431. Note that the first 3 decimals are identical.

The spelling of 969643813 in words is "nine hundred sixty-nine million, six hundred forty-three thousand, eight hundred thirteen".