6540637 has 2 divisors, whose sum is σ = 6540638. Its totient is φ = 6540636.

The previous prime is 6540623. The next prime is 6540643. The reversal of 6540637 is 7360456.

6540637 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4435236 + 2105401 = 2106^2 + 1451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6540599 and 6540608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6540337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270318 + 3270319.

It is an arithmetic number, because the mean of its divisors is an integer number (3270319).

Almost surely, 2^6540637 is an apocalyptic number.

It is an amenable number.

6540637 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540637 is an equidigital number, since it uses as much as digits as its factorization.

6540637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 6540637 is about 2557.4669108319. The cubic root of 6540637 is about 187.0136682508.

The spelling of 6540637 in words is "six million, five hundred forty thousand, six hundred thirty-seven".