131587429 has 8 divisors (see below), whose sum is σ = 143094168. Its totient is φ = 120499200.

The previous prime is 131587411. The next prime is 131587447. The reversal of 131587429 is 924785131.

It is an interprime number because it is at equal distance from previous prime (131587411) and next prime (131587447).

It can be written as a sum of positive squares in 4 ways, for example, as 49322529 + 82264900 = 7023^2 + 9070^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 131587429 - 2¹⁷ = 131456357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131587391 and 131587400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131587459) 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 7 ways as a sum of consecutive naturals, for example, 103972 + ... + 105229.

It is an arithmetic number, because the mean of its divisors is an integer number (17886771).

Almost surely, 2^131587429 is an apocalyptic number.

It is an amenable number.

131587429 is a deficient number, since it is larger than the sum of its proper divisors (11506739).

131587429 is a wasteful number, since it uses less digits than its factorization.

131587429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209255.

The product of its digits is 60480, while the sum is 40.

The square root of 131587429 is about 11471.1563933197. The cubic root of 131587429 is about 508.6333125282.

The spelling of 131587429 in words is "one hundred thirty-one million, five hundred eighty-seven thousand, four hundred twenty-nine".