813274843 has 2 divisors, whose sum is σ = 813274844. Its totient is φ = 813274842.

The previous prime is 813274831. The next prime is 813274897. The reversal of 813274843 is 348472318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813274843 - 2²¹ = 811177691 is a prime.

It is a super-2 number, since 2×813274843² = 1322831940513349298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813274796 and 813274805.

It is not a weakly prime, because it can be changed into another prime (813275843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406637421 + 406637422.

It is an arithmetic number, because the mean of its divisors is an integer number (406637422).

Almost surely, 2^813274843 is an apocalyptic number.

813274843 is a deficient number, since it is larger than the sum of its proper divisors (1).

813274843 is an equidigital number, since it uses as much as digits as its factorization.

813274843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 40.

The square root of 813274843 is about 28517.9740339317. The cubic root of 813274843 is about 933.4243216425.

The spelling of 813274843 in words is "eight hundred thirteen million, two hundred seventy-four thousand, eight hundred forty-three".