86171008897 has 2 divisors, whose sum is σ = 86171008898. Its totient is φ = 86171008896.

The previous prime is 86171008849. The next prime is 86171008927. The reversal of 86171008897 is 79880017168.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84171935376 + 1999073521 = 290124^2 + 44711^2 .

It is a cyclic number.

It is not a de Polignac number, because 86171008897 - 2¹¹ = 86171006849 is a prime.

It is not a weakly prime, because it can be changed into another prime (86171005897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43085504448 + 43085504449.

It is an arithmetic number, because the mean of its divisors is an integer number (43085504449).

Almost surely, 2^86171008897 is an apocalyptic number.

It is an amenable number.

86171008897 is a deficient number, since it is larger than the sum of its proper divisors (1).

86171008897 is an equidigital number, since it uses as much as digits as its factorization.

86171008897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 55.

The spelling of 86171008897 in words is "eighty-six billion, one hundred seventy-one million, eight thousand, eight hundred ninety-seven".