7987523801 has 2 divisors, whose sum is σ = 7987523802. Its totient is φ = 7987523800.

The previous prime is 7987523771. The next prime is 7987523821. The reversal of 7987523801 is 1083257897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5294017600 + 2693506201 = 72760^2 + 51899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7987523801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7987523801.

It is not a weakly prime, because it can be changed into another prime (7987523821) 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, 3993761900 + 3993761901.

It is an arithmetic number, because the mean of its divisors is an integer number (3993761901).

Almost surely, 2^7987523801 is an apocalyptic number.

It is an amenable number.

7987523801 is a deficient number, since it is larger than the sum of its proper divisors (1).

7987523801 is an equidigital number, since it uses as much as digits as its factorization.

7987523801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 7987523801 is about 89372.9478142016. The cubic root of 7987523801 is about 1998.9597758106.

The spelling of 7987523801 in words is "seven billion, nine hundred eighty-seven million, five hundred twenty-three thousand, eight hundred one".