6497989 has 2 divisors, whose sum is σ = 6497990. Its totient is φ = 6497988.

The previous prime is 6497969. The next prime is 6498007. The reversal of 6497989 is 9897946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5841889 + 656100 = 2417^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 6497989 - 2⁵ = 6497957 is a prime.

It is a super-2 number, since 2×6497989² = 84447722088242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6497929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3248994 + 3248995.

It is an arithmetic number, because the mean of its divisors is an integer number (3248995).

Almost surely, 2^6497989 is an apocalyptic number.

It is an amenable number.

6497989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6497989 is an equidigital number, since it uses as much as digits as its factorization.

6497989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 6497989 is about 2549.1153367394. The cubic root of 6497989 is about 186.6063094969.

The spelling of 6497989 in words is "six million, four hundred ninety-seven thousand, nine hundred eighty-nine".