6897281137 has 2 divisors, whose sum is σ = 6897281138. Its totient is φ = 6897281136.

The previous prime is 6897281107. The next prime is 6897281179. The reversal of 6897281137 is 7311827986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6882195681 + 15085456 = 82959^2 + 3884^2 .

It is a cyclic number.

It is not a de Polignac number, because 6897281137 - 2³¹ = 4749797489 is a prime.

It is not a weakly prime, because it can be changed into another prime (6897281107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3448640568 + 3448640569.

It is an arithmetic number, because the mean of its divisors is an integer number (3448640569).

Almost surely, 2^6897281137 is an apocalyptic number.

It is an amenable number.

6897281137 is a deficient number, since it is larger than the sum of its proper divisors (1).

6897281137 is an equidigital number, since it uses as much as digits as its factorization.

6897281137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 52.

The square root of 6897281137 is about 83049.8713846084. The cubic root of 6897281137 is about 1903.5281753794.

The spelling of 6897281137 in words is "six billion, eight hundred ninety-seven million, two hundred eighty-one thousand, one hundred thirty-seven".