6540629 has 4 divisors (see below), whose sum is σ = 6550176. Its totient is φ = 6531084.

The previous prime is 6540623. The next prime is 6540637. The reversal of 6540629 is 9260456.

6540629 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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-6540629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6540595 and 6540604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3659 + ... + 5144.

It is an arithmetic number, because the mean of its divisors is an integer number (1637544).

Almost surely, 2^6540629 is an apocalyptic number.

It is an amenable number.

6540629 is a deficient number, since it is larger than the sum of its proper divisors (9547).

6540629 is an equidigital number, since it uses as much as digits as its factorization.

6540629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9546.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6540629 is about 2557.4653467838. The cubic root of 6540629 is about 187.0135920039.

The spelling of 6540629 in words is "six million, five hundred forty thousand, six hundred twenty-nine".