131331729 has 16 divisors (see below), whose sum is σ = 177192000. Its totient is φ = 86519616.

The previous prime is 131331727. The next prime is 131331731. The reversal of 131331729 is 927133131.

It is an interprime number because it is at equal distance from previous prime (131331727) and next prime (131331731).

It is not a de Polignac number, because 131331729 - 2¹ = 131331727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131331696 and 131331705.

It is not an unprimeable number, because it can be changed into a prime (131331727) 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 15 ways as a sum of consecutive naturals, for example, 101722 + ... + 103004.

It is an arithmetic number, because the mean of its divisors is an integer number (11074500).

Almost surely, 2^131331729 is an apocalyptic number.

It is an amenable number.

131331729 is a deficient number, since it is larger than the sum of its proper divisors (45860271).

131331729 is a wasteful number, since it uses less digits than its factorization.

131331729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664.

The product of its digits is 3402, while the sum is 30.

The square root of 131331729 is about 11460.0056282709. The cubic root of 131331729 is about 508.3036410379.

The spelling of 131331729 in words is "one hundred thirty-one million, three hundred thirty-one thousand, seven hundred twenty-nine".