131342409 has 12 divisors (see below), whose sum is σ = 206963952. Its totient is φ = 79601400.

The previous prime is 131342401. The next prime is 131342411. The reversal of 131342409 is 904243131.

It is not a de Polignac number, because 131342409 - 2³ = 131342401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131342401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663247 + ... + 663444.

It is an arithmetic number, because the mean of its divisors is an integer number (17246996).

Almost surely, 2^131342409 is an apocalyptic number.

It is an amenable number.

131342409 is a deficient number, since it is larger than the sum of its proper divisors (75621543).

131342409 is a wasteful number, since it uses less digits than its factorization.

131342409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326708 (or 1326705 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 131342409 is about 11460.4715871556. The cubic root of 131342409 is about 508.3174192157.

The spelling of 131342409 in words is "one hundred thirty-one million, three hundred forty-two thousand, four hundred nine".