6890557 has 4 divisors (see below), whose sum is σ = 6903360. Its totient is φ = 6877756.

The previous prime is 6890549. The next prime is 6890579. The reversal of 6890557 is 7550986.

It is a happy number.

6890557 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 not a de Polignac number, because 6890557 - 2³ = 6890549 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 (6890537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5557 + ... + 6682.

It is an arithmetic number, because the mean of its divisors is an integer number (1725840).

Almost surely, 2^6890557 is an apocalyptic number.

It is an amenable number.

6890557 is a deficient number, since it is larger than the sum of its proper divisors (12803).

6890557 is a wasteful number, since it uses less digits than its factorization.

6890557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12802.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 6890557 is about 2624.9870475871. The cubic root of 6890557 is about 190.2909393106.

It can be divided in two parts, 6890 and 557, that added together give a palindrome (7447).

The spelling of 6890557 in words is "six million, eight hundred ninety thousand, five hundred fifty-seven".