6884539657 has 4 divisors (see below), whose sum is σ = 7289512596. Its totient is φ = 6479566720.

The previous prime is 6884539603. The next prime is 6884539681. The reversal of 6884539657 is 7569354886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2521144521 + 4363395136 = 50211^2 + 66056^2 .

It is a cyclic number.

It is not a de Polignac number, because 6884539657 - 2²³ = 6876151049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6884539595 and 6884539604.

It is not an unprimeable number, because it can be changed into a prime (6884533657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202486444 + ... + 202486477.

It is an arithmetic number, because the mean of its divisors is an integer number (1822378149).

Almost surely, 2^6884539657 is an apocalyptic number.

It is an amenable number.

6884539657 is a deficient number, since it is larger than the sum of its proper divisors (404972939).

6884539657 is a wasteful number, since it uses less digits than its factorization.

6884539657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404972938.

The product of its digits is 43545600, while the sum is 61.

The square root of 6884539657 is about 82973.1261132181. The cubic root of 6884539657 is about 1902.3553114708.

The spelling of 6884539657 in words is "six billion, eight hundred eighty-four million, five hundred thirty-nine thousand, six hundred fifty-seven".