131109 has 16 divisors (see below), whose sum is σ = 198720. Its totient is φ = 76160.

The previous prime is 131101. The next prime is 131111. The reversal of 131109 is 901131.

131109 = 16² + 17² + ... + 73².

It is a cyclic number.

It is not a de Polignac number, because 131109 - 2³ = 131101 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 889 + ... + 1025.

It is an arithmetic number, because the mean of its divisors is an integer number (12420).

2¹³¹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

131109 is a deficient number, since it is larger than the sum of its proper divisors (67611).

131109 is a wasteful number, since it uses less digits than its factorization.

131109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 131109 is about 362.0897678753. The cubic root of 131109 is about 50.8016129853.

The spelling of 131109 in words is "one hundred thirty-one thousand, one hundred nine".