131709429 has 16 divisors (see below), whose sum is σ = 195605440. Its totient is φ = 87590160.

The previous prime is 131709427. The next prime is 131709439. The reversal of 131709429 is 924907131.

It is not a de Polignac number, because 131709429 - 2¹ = 131709427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131709393 and 131709402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131709427) 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 15 ways as a sum of consecutive naturals, for example, 5574 + ... + 17160.

It is an arithmetic number, because the mean of its divisors is an integer number (12225340).

Almost surely, 2^131709429 is an apocalyptic number.

It is an amenable number.

131709429 is a deficient number, since it is larger than the sum of its proper divisors (63896011).

131709429 is a wasteful number, since it uses less digits than its factorization.

131709429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12017 (or 12011 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 131709429 is about 11476.4728466546. The cubic root of 131709429 is about 508.7904554435.

The spelling of 131709429 in words is "one hundred thirty-one million, seven hundred nine thousand, four hundred twenty-nine".