6389759989 has 2 divisors, whose sum is σ = 6389759990. Its totient is φ = 6389759988.

The previous prime is 6389759963. The next prime is 6389760001. The reversal of 6389759989 is 9899579836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4601315889 + 1788444100 = 67833^2 + 42290^2 .

It is a cyclic number.

It is not a de Polignac number, because 6389759989 - 2⁹ = 6389759477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6389729989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3194879994 + 3194879995.

It is an arithmetic number, because the mean of its divisors is an integer number (3194879995).

Almost surely, 2^6389759989 is an apocalyptic number.

It is an amenable number.

6389759989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6389759989 is an equidigital number, since it uses as much as digits as its factorization.

6389759989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264539520, while the sum is 73.

The square root of 6389759989 is about 79935.9743106944. The cubic root of 6389759989 is about 1855.6447981828.

The spelling of 6389759989 in words is "six billion, three hundred eighty-nine million, seven hundred fifty-nine thousand, nine hundred eighty-nine".