6817507897 has 2 divisors, whose sum is σ = 6817507898. Its totient is φ = 6817507896.

The previous prime is 6817507871. The next prime is 6817507937. The reversal of 6817507897 is 7987057186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6629379241 + 188128656 = 81421^2 + 13716^2 .

It is a cyclic number.

It is not a de Polignac number, because 6817507897 - 2¹⁵ = 6817475129 is a prime.

It is not a weakly prime, because it can be changed into another prime (6811507897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3408753948 + 3408753949.

It is an arithmetic number, because the mean of its divisors is an integer number (3408753949).

Almost surely, 2^6817507897 is an apocalyptic number.

It is an amenable number.

6817507897 is a deficient number, since it is larger than the sum of its proper divisors (1).

6817507897 is an equidigital number, since it uses as much as digits as its factorization.

6817507897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 58.

The square root of 6817507897 is about 82568.2014882243. The cubic root of 6817507897 is about 1896.1610294290.

The spelling of 6817507897 in words is "six billion, eight hundred seventeen million, five hundred seven thousand, eight hundred ninety-seven".