131431829 has 4 divisors (see below), whose sum is σ = 131719884. Its totient is φ = 131143776.

The previous prime is 131431813. The next prime is 131431831. The reversal of 131431829 is 928134131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 928134131 = 191 ⋅4859341.

It can be written as a sum of positive squares in 2 ways, for example, as 73702225 + 57729604 = 8585^2 + 7598^2 .

It is a cyclic number.

It is not a de Polignac number, because 131431829 - 2⁴ = 131431813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131431795 and 131431804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131436829) 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, 143342 + ... + 144255.

It is an arithmetic number, because the mean of its divisors is an integer number (32929971).

Almost surely, 2^131431829 is an apocalyptic number.

It is an amenable number.

131431829 is a deficient number, since it is larger than the sum of its proper divisors (288055).

131431829 is an equidigital number, since it uses as much as digits as its factorization.

131431829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288054.

The product of its digits is 5184, while the sum is 32.

The square root of 131431829 is about 11464.3721589976. The cubic root of 131431829 is about 508.4327499066.

The spelling of 131431829 in words is "one hundred thirty-one million, four hundred thirty-one thousand, eight hundred twenty-nine".