131739 has 4 divisors (see below), whose sum is σ = 175656. Its totient is φ = 87824.

The previous prime is 131731. The next prime is 131743. The reversal of 131739 is 937131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131739 - 2³ = 131731 is a prime.

It is a D-number.

131739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (131731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21954 + ... + 21959.

It is an arithmetic number, because the mean of its divisors is an integer number (43914).

2¹³¹⁷³⁹ is an apocalyptic number.

131739 is a deficient number, since it is larger than the sum of its proper divisors (43917).

131739 is an equidigital number, since it uses as much as digits as its factorization.

131739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43916.

The product of its digits is 567, while the sum is 24.

The square root of 131739 is about 362.9586753337. The cubic root of 131739 is about 50.8828529956.

The spelling of 131739 in words is "one hundred thirty-one thousand, seven hundred thirty-nine".