6888985121 has 2 divisors, whose sum is σ = 6888985122. Its totient is φ = 6888985120.

The previous prime is 6888985109. The next prime is 6888985141. The reversal of 6888985121 is 1215898886.

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., 6771479521 + 117505600 = 82289^2 + 10840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6888985121 - 2⁶ = 6888985057 is a prime.

It is not a weakly prime, because it can be changed into another prime (6888985141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3444492560 + 3444492561.

It is an arithmetic number, because the mean of its divisors is an integer number (3444492561).

Almost surely, 2^6888985121 is an apocalyptic number.

It is an amenable number.

6888985121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6888985121 is an equidigital number, since it uses as much as digits as its factorization.

6888985121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 56.

The square root of 6888985121 is about 82999.9103674215. The cubic root of 6888985121 is about 1902.7646843983.

The spelling of 6888985121 in words is "six billion, eight hundred eighty-eight million, nine hundred eighty-five thousand, one hundred twenty-one".