6391590889 has 2 divisors, whose sum is σ = 6391590890. Its totient is φ = 6391590888.

The previous prime is 6391590871. The next prime is 6391590949. The reversal of 6391590889 is 9880951936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5910534400 + 481056489 = 76880^2 + 21933^2 .

It is a cyclic number.

It is not a de Polignac number, because 6391590889 - 2⁹ = 6391590377 is a prime.

It is a super-3 number, since 3×6391590889³ (a number of 30 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (6391590859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195795444 + 3195795445.

It is an arithmetic number, because the mean of its divisors is an integer number (3195795445).

Almost surely, 2^6391590889 is an apocalyptic number.

It is an amenable number.

6391590889 is a deficient number, since it is larger than the sum of its proper divisors (1).

6391590889 is an equidigital number, since it uses as much as digits as its factorization.

6391590889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The square root of 6391590889 is about 79947.4257809468. The cubic root of 6391590889 is about 1855.8220179645.

The spelling of 6391590889 in words is "six billion, three hundred ninety-one million, five hundred ninety thousand, eight hundred eighty-nine".