6540973 has 4 divisors (see below), whose sum is σ = 6552160. Its totient is φ = 6529788.

The previous prime is 6540967. The next prime is 6540977. The reversal of 6540973 is 3790456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4665 + ... + 5902.

It is an arithmetic number, because the mean of its divisors is an integer number (1638040).

Almost surely, 2^6540973 is an apocalyptic number.

It is an amenable number.

6540973 is a deficient number, since it is larger than the sum of its proper divisors (11187).

6540973 is a wasteful number, since it uses less digits than its factorization.

6540973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11186.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 6540973 is about 2557.5325999877. The cubic root of 6540973 is about 187.0168705646.

The spelling of 6540973 in words is "six million, five hundred forty thousand, nine hundred seventy-three".