6506739 has 6 divisors (see below), whose sum is σ = 9398636. Its totient is φ = 4337820.

The previous prime is 6506719. The next prime is 6506779. The reversal of 6506739 is 9376056.

It is a happy number.

It is not a de Polignac number, because 6506739 - 2⁵ = 6506707 is a prime.

It is a Duffinian number.

6506739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6506719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 361477 + ... + 361494.

Almost surely, 2^6506739 is an apocalyptic number.

6506739 is a deficient number, since it is larger than the sum of its proper divisors (2891897).

6506739 is a wasteful number, since it uses less digits than its factorization.

6506739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722977 (or 722974 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 6506739 is about 2550.8310410531. The cubic root of 6506739 is about 186.6900314433.

The spelling of 6506739 in words is "six million, five hundred six thousand, seven hundred thirty-nine".