6868621189 has 2 divisors, whose sum is σ = 6868621190. Its totient is φ = 6868621188.

The previous prime is 6868621181. The next prime is 6868621241. The reversal of 6868621189 is 9811268686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6665416164 + 203205025 = 81642^2 + 14255^2 .

It is a cyclic number.

It is not a de Polignac number, because 6868621189 - 2³ = 6868621181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6868621181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3434310594 + 3434310595.

It is an arithmetic number, because the mean of its divisors is an integer number (3434310595).

Almost surely, 2^6868621189 is an apocalyptic number.

It is an amenable number.

6868621189 is a deficient number, since it is larger than the sum of its proper divisors (1).

6868621189 is an equidigital number, since it uses as much as digits as its factorization.

6868621189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 55.

The square root of 6868621189 is about 82877.1451547409. The cubic root of 6868621189 is about 1900.8879680446.

The spelling of 6868621189 in words is "six billion, eight hundred sixty-eight million, six hundred twenty-one thousand, one hundred eighty-nine".