6812897281 has 2 divisors, whose sum is σ = 6812897282. Its totient is φ = 6812897280.

The previous prime is 6812897261. The next prime is 6812897309. The reversal of 6812897281 is 1827982186.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4058327025 + 2754570256 = 63705^2 + 52484^2 .

It is a cyclic number.

It is not a de Polignac number, because 6812897281 - 2¹⁷ = 6812766209 is a prime.

It is a super-2 number, since 2×6812897281² = 92831138722914385922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6812897251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3406448640 + 3406448641.

It is an arithmetic number, because the mean of its divisors is an integer number (3406448641).

Almost surely, 2^6812897281 is an apocalyptic number.

It is an amenable number.

6812897281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6812897281 is an equidigital number, since it uses as much as digits as its factorization.

6812897281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 52.

The square root of 6812897281 is about 82540.2767199141. The cubic root of 6812897281 is about 1895.7334811190.

The spelling of 6812897281 in words is "six billion, eight hundred twelve million, eight hundred ninety-seven thousand, two hundred eighty-one".