6489797389 has 4 divisors (see below), whose sum is σ = 6489959580. Its totient is φ = 6489635200.

The previous prime is 6489797359. The next prime is 6489797407. The reversal of 6489797389 is 9837979846.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2075258025 + 4414539364 = 45555^2 + 66442^2 .

It is a cyclic number.

It is not a de Polignac number, because 6489797389 - 2⁵ = 6489797357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6489797359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26589 + ... + 116989.

It is an arithmetic number, because the mean of its divisors is an integer number (1622489895).

Almost surely, 2^6489797389 is an apocalyptic number.

It is an amenable number.

6489797389 is a deficient number, since it is larger than the sum of its proper divisors (162191).

6489797389 is an equidigital number, since it uses as much as digits as its factorization.

6489797389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162190.

The product of its digits is 164602368, while the sum is 70.

The square root of 6489797389 is about 80559.2787269102. The cubic root of 6489797389 is about 1865.2786219635.

The spelling of 6489797389 in words is "six billion, four hundred eighty-nine million, seven hundred ninety-seven thousand, three hundred eighty-nine".