813683978071 has 2 divisors, whose sum is σ = 813683978072. Its totient is φ = 813683978070.

The previous prime is 813683978059. The next prime is 813683978077. The reversal of 813683978071 is 170879386318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 813683978071 - 2⁹ = 813683977559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813683978077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406841989035 + 406841989036.

It is an arithmetic number, because the mean of its divisors is an integer number (406841989036).

Almost surely, 2^813683978071 is an apocalyptic number.

813683978071 is a deficient number, since it is larger than the sum of its proper divisors (1).

813683978071 is an equidigital number, since it uses as much as digits as its factorization.

813683978071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 813683978071 in words is "eight hundred thirteen billion, six hundred eighty-three million, nine hundred seventy-eight thousand, seventy-one".