813274897 has 2 divisors, whose sum is σ = 813274898. Its totient is φ = 813274896.

The previous prime is 813274843. The next prime is 813274907. The reversal of 813274897 is 798472318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665433616 + 147841281 = 25796^2 + 12159^2 .

It is a cyclic number.

It is not a de Polignac number, because 813274897 - 2¹¹ = 813272849 is a prime.

It is a super-2 number, since 2×813274897² = 1322832116180721218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 813274897.

It is not a weakly prime, because it can be changed into another prime (813274807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406637448 + 406637449.

It is an arithmetic number, because the mean of its divisors is an integer number (406637449).

Almost surely, 2^813274897 is an apocalyptic number.

It is an amenable number.

813274897 is a deficient number, since it is larger than the sum of its proper divisors (1).

813274897 is an equidigital number, since it uses as much as digits as its factorization.

813274897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 49.

The square root of 813274897 is about 28517.9749807030. The cubic root of 813274897 is about 933.4243423018.

The spelling of 813274897 in words is "eight hundred thirteen million, two hundred seventy-four thousand, eight hundred ninety-seven".