6499879 has 2 divisors, whose sum is σ = 6499880. Its totient is φ = 6499878.

The previous prime is 6499861. The next prime is 6499897. The reversal of 6499879 is 9789946.

Together with next prime (6499897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (6499861) and next prime (6499897).

It is a cyclic number.

It is not a de Polignac number, because 6499879 - 2¹¹ = 6497831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6499859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3249939 + 3249940.

It is an arithmetic number, because the mean of its divisors is an integer number (3249940).

Almost surely, 2^6499879 is an apocalyptic number.

6499879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6499879 is an equidigital number, since it uses as much as digits as its factorization.

6499879 is an evil number, because the sum of its binary digits is even.

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

The square root of 6499879 is about 2549.4860266336. The cubic root of 6499879 is about 186.6243997982.

The spelling of 6499879 in words is "six million, four hundred ninety-nine thousand, eight hundred seventy-nine".