6557897 has 4 divisors (see below), whose sum is σ = 6570960. Its totient is φ = 6544836.

The previous prime is 6557867. The next prime is 6557939. The reversal of 6557897 is 7987556.

It is a happy number.

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 6557897 - 2¹² = 6553801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6557807) 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, 5747 + ... + 6792.

It is an arithmetic number, because the mean of its divisors is an integer number (1642740).

Almost surely, 2^6557897 is an apocalyptic number.

It is an amenable number.

6557897 is a deficient number, since it is larger than the sum of its proper divisors (13063).

6557897 is a wasteful number, since it uses less digits than its factorization.

6557897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13062.

The product of its digits is 529200, while the sum is 47.

The square root of 6557897 is about 2560.8391202885. The cubic root of 6557897 is about 187.1780263887.

The spelling of 6557897 in words is "six million, five hundred fifty-seven thousand, eight hundred ninety-seven".