8251887697 has 2 divisors, whose sum is σ = 8251887698. Its totient is φ = 8251887696.

The previous prime is 8251887659. The next prime is 8251887727. The reversal of 8251887697 is 7967881528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6399360016 + 1852527681 = 79996^2 + 43041^2 .

It is a cyclic number.

It is not a de Polignac number, because 8251887697 - 2⁷ = 8251887569 is a prime.

It is not a weakly prime, because it can be changed into another prime (8251887617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4125943848 + 4125943849.

It is an arithmetic number, because the mean of its divisors is an integer number (4125943849).

Almost surely, 2^8251887697 is an apocalyptic number.

It is an amenable number.

8251887697 is a deficient number, since it is larger than the sum of its proper divisors (1).

8251887697 is an equidigital number, since it uses as much as digits as its factorization.

8251887697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13547520, while the sum is 61.

The square root of 8251887697 is about 90839.9014585551. The cubic root of 8251887697 is about 2020.7741124302.

The spelling of 8251887697 in words is "eight billion, two hundred fifty-one million, eight hundred eighty-seven thousand, six hundred ninety-seven".