131443487 has 4 divisors (see below), whose sum is σ = 150221136. Its totient is φ = 112665840.

The previous prime is 131443469. The next prime is 131443513. The reversal of 131443487 is 784344131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784344131 = 47 ⋅16688173.

It is not a de Polignac number, because 131443487 - 2¹² = 131439391 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 (131443447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9388814 + ... + 9388827.

It is an arithmetic number, because the mean of its divisors is an integer number (37555284).

Almost surely, 2^131443487 is an apocalyptic number.

131443487 is a deficient number, since it is larger than the sum of its proper divisors (18777649).

131443487 is an equidigital number, since it uses as much as digits as its factorization.

131443487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18777648.

The product of its digits is 32256, while the sum is 35.

The square root of 131443487 is about 11464.8805924877. The cubic root of 131443487 is about 508.4477821196.

The spelling of 131443487 in words is "one hundred thirty-one million, four hundred forty-three thousand, four hundred eighty-seven".