7131686 has 8 divisors (see below), whose sum is σ = 10925280. Its totient is φ = 3489928.

The previous prime is 7131661. The next prime is 7131689. The reversal of 7131686 is 6861317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7131689) 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, 37841 + ... + 38028.

It is an arithmetic number, because the mean of its divisors is an integer number (1365660).

Almost surely, 2^7131686 is an apocalyptic number.

7131686 is a deficient number, since it is larger than the sum of its proper divisors (3793594).

7131686 is a wasteful number, since it uses less digits than its factorization.

7131686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75918.

The product of its digits is 6048, while the sum is 32.

The square root of 7131686 is about 2670.5216718836. The cubic root of 7131686 is about 192.4852274041.

The spelling of 7131686 in words is "seven million, one hundred thirty-one thousand, six hundred eighty-six".