131644323 has 6 divisors (see below), whose sum is σ = 190152924. Its totient is φ = 87762876.

The previous prime is 131644319. The next prime is 131644349. The reversal of 131644323 is 323446131.

131644323 is a `hidden beast` number, since 13 + 1 + 644 + 3 + 2 + 3 = 666.

It is not a de Polignac number, because 131644323 - 2² = 131644319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131644393) 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 5 ways as a sum of consecutive naturals, for example, 7313565 + ... + 7313582.

It is an arithmetic number, because the mean of its divisors is an integer number (31692154).

Almost surely, 2^131644323 is an apocalyptic number.

131644323 is a deficient number, since it is larger than the sum of its proper divisors (58508601).

131644323 is a wasteful number, since it uses less digits than its factorization.

131644323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14627153 (or 14627150 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 131644323 is about 11473.6359973637. The cubic root of 131644323 is about 508.7066073058.

The spelling of 131644323 in words is "one hundred thirty-one million, six hundred forty-four thousand, three hundred twenty-three".