671097315893 has 2 divisors, whose sum is σ = 671097315894. Its totient is φ = 671097315892.

The previous prime is 671097315839. The next prime is 671097315937. The reversal of 671097315893 is 398513790176.

Together with previous prime (671097315839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 537614501284 + 133482814609 = 733222^2 + 365353^2 .

It is a cyclic number.

It is not a de Polignac number, because 671097315893 - 2²⁸ = 670828880437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671097315193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335548657946 + 335548657947.

It is an arithmetic number, because the mean of its divisors is an integer number (335548657947).

Almost surely, 2^671097315893 is an apocalyptic number.

It is an amenable number.

671097315893 is a deficient number, since it is larger than the sum of its proper divisors (1).

671097315893 is an equidigital number, since it uses as much as digits as its factorization.

671097315893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8573040, while the sum is 59.

The spelling of 671097315893 in words is "six hundred seventy-one billion, ninety-seven million, three hundred fifteen thousand, eight hundred ninety-three".