131812709 has 8 divisors (see below), whose sum is σ = 158571840. Its totient is φ = 107035776.

The previous prime is 131812699. The next prime is 131812717. The reversal of 131812709 is 907218131.

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 131812709 - 2¹² = 131808613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131812739) 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 7 ways as a sum of consecutive naturals, for example, 495404 + ... + 495669.

It is an arithmetic number, because the mean of its divisors is an integer number (19821480).

Almost surely, 2^131812709 is an apocalyptic number.

131812709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

131812709 is a deficient number, since it is larger than the sum of its proper divisors (26759131).

131812709 is an equidigital number, since it uses as much as digits as its factorization.

131812709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991099.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 131812709 is about 11480.9716052258. The cubic root of 131812709 is about 508.9234101086.

The spelling of 131812709 in words is "one hundred thirty-one million, eight hundred twelve thousand, seven hundred nine".