131338605 has 16 divisors (see below), whose sum is σ = 211049280. Its totient is φ = 69744768.

The previous prime is 131338589. The next prime is 131338609. The reversal of 131338605 is 506833131.

It is not a de Polignac number, because 131338605 - 2⁴ = 131338589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131338609) 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, 15295 + ... + 22284.

It is an arithmetic number, because the mean of its divisors is an integer number (13190580).

Almost surely, 2^131338605 is an apocalyptic number.

131338605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131338605 is a deficient number, since it is larger than the sum of its proper divisors (79710675).

131338605 is a wasteful number, since it uses less digits than its factorization.

131338605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37820.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 131338605 is about 11460.3056241969. The cubic root of 131338605 is about 508.3125117931.

The spelling of 131338605 in words is "one hundred thirty-one million, three hundred thirty-eight thousand, six hundred five".