131159493 has 14 divisors (see below), whose sum is σ = 196650374. Its totient is φ = 87439176.

The previous prime is 131159491. The next prime is 131159531. The reversal of 131159493 is 394951131.

131159493 is a `hidden beast` number, since 13 + 1 + 159 + 493 = 666.

It can be written as a sum of positive squares in only one way, i.e., 127983969 + 3175524 = 11313^2 + 1782^2 .

It is not a de Polignac number, because 131159493 - 2¹ = 131159491 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 (131159491) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 89230 + ... + 90687.

Almost surely, 2^131159493 is an apocalyptic number.

It is an amenable number.

131159493 is a deficient number, since it is larger than the sum of its proper divisors (65490881).

131159493 is an frugal number, since it uses more digits than its factorization.

131159493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179935 (or 179920 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 131159493 is about 11452.4885068705. The cubic root of 131159493 is about 508.0813375971.

The spelling of 131159493 in words is "one hundred thirty-one million, one hundred fifty-nine thousand, four hundred ninety-three".