6985625917 has 2 divisors, whose sum is σ = 6985625918. Its totient is φ = 6985625916.

The previous prime is 6985625909. The next prime is 6985625923. The reversal of 6985625917 is 7195265896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6591166596 + 394459321 = 81186^2 + 19861^2 .

It is a cyclic number.

It is not a de Polignac number, because 6985625917 - 2³ = 6985625909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6985625947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3492812958 + 3492812959.

It is an arithmetic number, because the mean of its divisors is an integer number (3492812959).

Almost surely, 2^6985625917 is an apocalyptic number.

It is an amenable number.

6985625917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6985625917 is an equidigital number, since it uses as much as digits as its factorization.

6985625917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 58.

The square root of 6985625917 is about 83580.0569334575. The cubic root of 6985625917 is about 1911.6209221061.

The spelling of 6985625917 in words is "six billion, nine hundred eighty-five million, six hundred twenty-five thousand, nine hundred seventeen".