6843657 has 4 divisors (see below), whose sum is σ = 9124880. Its totient is φ = 4562436.

The previous prime is 6843643. The next prime is 6843671. The reversal of 6843657 is 7563486.

6843657 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 an interprime number because it is at equal distance from previous prime (6843643) and next prime (6843671).

It is not a de Polignac number, because 6843657 - 2⁶ = 6843593 is a prime.

It is a super-2 number, since 2×6843657² = 93671282267298, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

6843657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6843607) 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, 1140607 + ... + 1140612.

It is an arithmetic number, because the mean of its divisors is an integer number (2281220).

Almost surely, 2^6843657 is an apocalyptic number.

It is an amenable number.

6843657 is a deficient number, since it is larger than the sum of its proper divisors (2281223).

6843657 is a wasteful number, since it uses less digits than its factorization.

6843657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281222.

The product of its digits is 120960, while the sum is 39.

The square root of 6843657 is about 2616.0384171491. The cubic root of 6843657 is about 189.8582229495.

The spelling of 6843657 in words is "six million, eight hundred forty-three thousand, six hundred fifty-seven".