6389657447 has 2 divisors, whose sum is σ = 6389657448. Its totient is φ = 6389657446.

The previous prime is 6389657359. The next prime is 6389657453. The reversal of 6389657447 is 7447569836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6389657447 - 2¹⁶ = 6389591911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6389657467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3194828723 + 3194828724.

It is an arithmetic number, because the mean of its divisors is an integer number (3194828724).

Almost surely, 2^6389657447 is an apocalyptic number.

6389657447 is a deficient number, since it is larger than the sum of its proper divisors (1).

6389657447 is an equidigital number, since it uses as much as digits as its factorization.

6389657447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 59.

The square root of 6389657447 is about 79935.3329072945. The cubic root of 6389657447 is about 1855.6348717512.

The spelling of 6389657447 in words is "six billion, three hundred eighty-nine million, six hundred fifty-seven thousand, four hundred forty-seven".