131399 has 8 divisors (see below), whose sum is σ = 142560. Its totient is φ = 120736.

The previous prime is 131381. The next prime is 131413. The reversal of 131399 is 993131.

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 131399 - 2⁸ = 131143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 131399.

It is not an unprimeable number, because it can be changed into a prime (131899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569 + ... + 765.

It is an arithmetic number, because the mean of its divisors is an integer number (17820).

2¹³¹³⁹⁹ is an apocalyptic number.

131399 is a deficient number, since it is larger than the sum of its proper divisors (11161).

131399 is a wasteful number, since it uses less digits than its factorization.

131399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249.

The product of its digits is 729, while the sum is 26.

The square root of 131399 is about 362.4899998621. The cubic root of 131399 is about 50.8390414325.

The spelling of 131399 in words is "one hundred thirty-one thousand, three hundred ninety-nine".