6397637 has 4 divisors (see below), whose sum is σ = 6457536. Its totient is φ = 6337740.

The previous prime is 6397631. The next prime is 6397649. The reversal of 6397637 is 7367936.

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 not a de Polignac number, because 6397637 - 2¹⁰ = 6396613 is a prime.

It is a d-powerful number, because it can be written as 6 + 3⁷ + 9⁷ + 7² + 6⁴ + 3¹³ + 7⁵ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6397594 and 6397603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397631) 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, 29789 + ... + 30002.

It is an arithmetic number, because the mean of its divisors is an integer number (1614384).

Almost surely, 2^6397637 is an apocalyptic number.

It is an amenable number.

6397637 is a deficient number, since it is larger than the sum of its proper divisors (59899).

6397637 is a wasteful number, since it uses less digits than its factorization.

6397637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59898.

The product of its digits is 142884, while the sum is 41.

The square root of 6397637 is about 2529.3550561359. The cubic root of 6397637 is about 185.6407003767.

Subtracting 6397637 from its reverse (7367936), we obtain a cube (970299 = 99³).

The spelling of 6397637 in words is "six million, three hundred ninety-seven thousand, six hundred thirty-seven".