131232493 has 4 divisors (see below), whose sum is σ = 149980000. Its totient is φ = 112484988.

The previous prime is 131232481. The next prime is 131232499. The reversal of 131232493 is 394232131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131232493 - 2⁹ = 131231981 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 (131232499) 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 3 ways as a sum of consecutive naturals, for example, 9373743 + ... + 9373756.

It is an arithmetic number, because the mean of its divisors is an integer number (37495000).

Almost surely, 2^131232493 is an apocalyptic number.

It is an amenable number.

131232493 is a deficient number, since it is larger than the sum of its proper divisors (18747507).

131232493 is an equidigital number, since it uses as much as digits as its factorization.

131232493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18747506.

The product of its digits is 3888, while the sum is 28.

The square root of 131232493 is about 11455.6751437879. The cubic root of 131232493 is about 508.1755817824.

The spelling of 131232493 in words is "one hundred thirty-one million, two hundred thirty-two thousand, four hundred ninety-three".