6857671989 has 16 divisors (see below), whose sum is σ = 10456750080. Its totient is φ = 3916058160.

The previous prime is 6857671987. The next prime is 6857671991. The reversal of 6857671989 is 9891767586.

It is an interprime number because it is at equal distance from previous prime (6857671987) and next prime (6857671991).

It is not a de Polignac number, because 6857671989 - 2¹ = 6857671987 is a prime.

It is a super-2 number, since 2×6857671989² = 94055330217430432242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857671981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76329 + ... + 139790.

It is an arithmetic number, because the mean of its divisors is an integer number (653546880).

Almost surely, 2^6857671989 is an apocalyptic number.

It is an amenable number.

6857671989 is a deficient number, since it is larger than the sum of its proper divisors (3599078091).

6857671989 is a wasteful number, since it uses less digits than its factorization.

6857671989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217640.

The product of its digits is 45722880, while the sum is 66.

The square root of 6857671989 is about 82811.0619965714. The cubic root of 6857671989 is about 1899.8773687242.

The spelling of 6857671989 in words is "six billion, eight hundred fifty-seven million, six hundred seventy-one thousand, nine hundred eighty-nine".