7981417237 has 2 divisors, whose sum is σ = 7981417238. Its totient is φ = 7981417236.

The previous prime is 7981417211. The next prime is 7981417247. The reversal of 7981417237 is 7327141897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6450338596 + 1531078641 = 80314^2 + 39129^2 .

It is an emirp because it is prime and its reverse (7327141897) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7981417237 is a prime.

It is a super-2 number, since 2×7981417237² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7981417247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990708618 + 3990708619.

It is an arithmetic number, because the mean of its divisors is an integer number (3990708619).

Almost surely, 2^7981417237 is an apocalyptic number.

It is an amenable number.

7981417237 is a deficient number, since it is larger than the sum of its proper divisors (1).

7981417237 is an equidigital number, since it uses as much as digits as its factorization.

7981417237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 49.

The square root of 7981417237 is about 89338.7779018719. Note that the first 3 decimals coincide. The cubic root of 7981417237 is about 1998.4502358424.

The spelling of 7981417237 in words is "seven billion, nine hundred eighty-one million, four hundred seventeen thousand, two hundred thirty-seven".