6791121287 has 2 divisors, whose sum is σ = 6791121288. Its totient is φ = 6791121286.

The previous prime is 6791121251. The next prime is 6791121329. The reversal of 6791121287 is 7821211976.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6791121287 - 2⁸ = 6791121031 is a prime.

It is a super-2 number, since 2×6791121287² = 92238656669489072738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6791121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3395560643 + 3395560644.

It is an arithmetic number, because the mean of its divisors is an integer number (3395560644).

Almost surely, 2^6791121287 is an apocalyptic number.

6791121287 is a deficient number, since it is larger than the sum of its proper divisors (1).

6791121287 is an equidigital number, since it uses as much as digits as its factorization.

6791121287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 44.

The square root of 6791121287 is about 82408.2598226658. The cubic root of 6791121287 is about 1893.7115541767.

It can be divided in two parts, 67911 and 21287, that added together give a palindrome (89198).

The spelling of 6791121287 in words is "six billion, seven hundred ninety-one million, one hundred twenty-one thousand, two hundred eighty-seven".