6539973 has 16 divisors (see below), whose sum is σ = 9676800. Its totient is φ = 3895280.

The previous prime is 6539963. The next prime is 6539983. The reversal of 6539973 is 3799356.

6539973 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6539963) and next prime (6539983).

It is a cyclic number.

It is not a de Polignac number, because 6539973 - 2⁴ = 6539957 is a prime.

It is a Curzon number.

6539973 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268 + ... + 3626.

It is an arithmetic number, because the mean of its divisors is an integer number (604800).

Almost surely, 2^6539973 is an apocalyptic number.

It is an amenable number.

6539973 is a deficient number, since it is larger than the sum of its proper divisors (3136827).

6539973 is a wasteful number, since it uses less digits than its factorization.

6539973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432.

The product of its digits is 153090, while the sum is 42.

The square root of 6539973 is about 2557.3370915857. The cubic root of 6539973 is about 187.0073395463.

The spelling of 6539973 in words is "six million, five hundred thirty-nine thousand, nine hundred seventy-three".