6131689 has 4 divisors (see below), whose sum is σ = 6138756. Its totient is φ = 6124624.

The previous prime is 6131683. The next prime is 6131753. The reversal of 6131689 is 9861316.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 153664 + 5978025 = 392^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 6131689 - 2³ = 6131681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6131681) 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, 2014 + ... + 4039.

It is an arithmetic number, because the mean of its divisors is an integer number (1534689).

Almost surely, 2^6131689 is an apocalyptic number.

It is an amenable number.

6131689 is a deficient number, since it is larger than the sum of its proper divisors (7067).

6131689 is a wasteful number, since it uses less digits than its factorization.

6131689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066.

The product of its digits is 7776, while the sum is 34.

The square root of 6131689 is about 2476.2247474735. The cubic root of 6131689 is about 183.0318656126.

The spelling of 6131689 in words is "six million, one hundred thirty-one thousand, six hundred eighty-nine".