6388668829 has 2 divisors, whose sum is σ = 6388668830. Its totient is φ = 6388668828.

The previous prime is 6388668809. The next prime is 6388668859. The reversal of 6388668829 is 9288668836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3709053604 + 2679615225 = 60902^2 + 51765^2 .

It is a cyclic number.

It is not a de Polignac number, because 6388668829 - 2²¹ = 6386571677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6388668809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3194334414 + 3194334415.

It is an arithmetic number, because the mean of its divisors is an integer number (3194334415).

Almost surely, 2^6388668829 is an apocalyptic number.

It is an amenable number.

6388668829 is a deficient number, since it is larger than the sum of its proper divisors (1).

6388668829 is an equidigital number, since it uses as much as digits as its factorization.

6388668829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47775744, while the sum is 64.

The square root of 6388668829 is about 79929.1488069278. The cubic root of 6388668829 is about 1855.5391645519.

The spelling of 6388668829 in words is "six billion, three hundred eighty-eight million, six hundred sixty-eight thousand, eight hundred twenty-nine".