7987447903 has 2 divisors, whose sum is σ = 7987447904. Its totient is φ = 7987447902.

The previous prime is 7987447891. The next prime is 7987447973. The reversal of 7987447903 is 3097447897.

It is a weak prime.

It is an emirp because it is prime and its reverse (3097447897) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7987447903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7987447973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993723951 + 3993723952.

It is an arithmetic number, because the mean of its divisors is an integer number (3993723952).

Almost surely, 2^7987447903 is an apocalyptic number.

7987447903 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987447903 is an equidigital number, since it uses as much as digits as its factorization.

7987447903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10668672, while the sum is 58.

The square root of 7987447903 is about 89372.5231992473. The cubic root of 7987447903 is about 1998.9534443728.

The spelling of 7987447903 in words is "seven billion, nine hundred eighty-seven million, four hundred forty-seven thousand, nine hundred three".