7173970987 has 2 divisors, whose sum is σ = 7173970988. Its totient is φ = 7173970986.

The previous prime is 7173970949. The next prime is 7173971017. The reversal of 7173970987 is 7890793717.

It is a strong prime.

It is an emirp because it is prime and its reverse (7890793717) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7173970987 is a prime.

It is not a weakly prime, because it can be changed into another prime (7173970907) 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, 3586985493 + 3586985494.

It is an arithmetic number, because the mean of its divisors is an integer number (3586985494).

Almost surely, 2^7173970987 is an apocalyptic number.

7173970987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7173970987 is an equidigital number, since it uses as much as digits as its factorization.

7173970987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4667544, while the sum is 58.

The square root of 7173970987 is about 84699.2974410060. The cubic root of 7173970987 is about 1928.6490395420.

The spelling of 7173970987 in words is "seven billion, one hundred seventy-three million, nine hundred seventy thousand, nine hundred eighty-seven".