6889531261 has 2 divisors, whose sum is σ = 6889531262. Its totient is φ = 6889531260.

The previous prime is 6889531249. The next prime is 6889531267. The reversal of 6889531261 is 1621359886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5989831236 + 899700025 = 77394^2 + 29995^2 .

It is a cyclic number.

It is not a de Polignac number, because 6889531261 - 2⁹ = 6889530749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6889531267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3444765630 + 3444765631.

It is an arithmetic number, because the mean of its divisors is an integer number (3444765631).

Almost surely, 2^6889531261 is an apocalyptic number.

It is an amenable number.

6889531261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6889531261 is an equidigital number, since it uses as much as digits as its factorization.

6889531261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 49.

The square root of 6889531261 is about 83003.2003057713. The cubic root of 6889531261 is about 1902.8149650723.

The spelling of 6889531261 in words is "six billion, eight hundred eighty-nine million, five hundred thirty-one thousand, two hundred sixty-one".