813793941277 has 2 divisors, whose sum is σ = 813793941278. Its totient is φ = 813793941276.

The previous prime is 813793941241. The next prime is 813793941293. The reversal of 813793941277 is 772149397318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571908012516 + 241885928761 = 756246^2 + 491819^2 .

It is a cyclic number.

It is not a de Polignac number, because 813793941277 - 2³⁹ = 264038127389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813793941217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406896970638 + 406896970639.

It is an arithmetic number, because the mean of its divisors is an integer number (406896970639).

Almost surely, 2^813793941277 is an apocalyptic number.

It is an amenable number.

813793941277 is a deficient number, since it is larger than the sum of its proper divisors (1).

813793941277 is an equidigital number, since it uses as much as digits as its factorization.

813793941277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 61.

The spelling of 813793941277 in words is "eight hundred thirteen billion, seven hundred ninety-three million, nine hundred forty-one thousand, two hundred seventy-seven".