131606783 has 16 divisors (see below), whose sum is σ = 165196800. Its totient is φ = 101853600.

The previous prime is 131606779. The next prime is 131606801. The reversal of 131606783 is 387606131.

It is a Cunningham number, because it is equal to 11472²-1.

It is a cyclic number.

It is not a de Polignac number, because 131606783 - 2² = 131606779 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131606723) 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 15 ways as a sum of consecutive naturals, for example, 5738 + ... + 17208.

It is an arithmetic number, because the mean of its divisors is an integer number (10324800).

Almost surely, 2^131606783 is an apocalyptic number.

131606783 is a deficient number, since it is larger than the sum of its proper divisors (33590017).

131606783 is a wasteful number, since it uses less digits than its factorization.

131606783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11638.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 131606783 is about 11471.9999564156. Note that the first 4 decimals coincide. The cubic root of 131606783 is about 508.6582480574.

The spelling of 131606783 in words is "one hundred thirty-one million, six hundred six thousand, seven hundred eighty-three".