6897770291 has 2 divisors, whose sum is σ = 6897770292. Its totient is φ = 6897770290.

The previous prime is 6897770239. The next prime is 6897770323. The reversal of 6897770291 is 1920777986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6897770291 - 2¹⁸ = 6897508147 is a prime.

It is not a weakly prime, because it can be changed into another prime (6897773291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3448885145 + 3448885146.

It is an arithmetic number, because the mean of its divisors is an integer number (3448885146).

Almost surely, 2^6897770291 is an apocalyptic number.

6897770291 is a deficient number, since it is larger than the sum of its proper divisors (1).

6897770291 is an equidigital number, since it uses as much as digits as its factorization.

6897770291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 56.

The square root of 6897770291 is about 83052.8162737423. The cubic root of 6897770291 is about 1903.5731736133.

The spelling of 6897770291 in words is "six billion, eight hundred ninety-seven million, seven hundred seventy thousand, two hundred ninety-one".