8689431973 has 2 divisors, whose sum is σ = 8689431974. Its totient is φ = 8689431972.

The previous prime is 8689431923. The next prime is 8689431977. The reversal of 8689431973 is 3791349868.

8689431973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8683071489 + 6360484 = 93183^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 8689431973 - 2²⁵ = 8655877541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8689431977) 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, 4344715986 + 4344715987.

It is an arithmetic number, because the mean of its divisors is an integer number (4344715987).

Almost surely, 2^8689431973 is an apocalyptic number.

It is an amenable number.

8689431973 is a deficient number, since it is larger than the sum of its proper divisors (1).

8689431973 is an equidigital number, since it uses as much as digits as its factorization.

8689431973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The square root of 8689431973 is about 93217.1227457703. The cubic root of 8689431973 is about 2055.8770060624.

The spelling of 8689431973 in words is "eight billion, six hundred eighty-nine million, four hundred thirty-one thousand, nine hundred seventy-three".