131116487 has 4 divisors (see below), whose sum is σ = 131260080. Its totient is φ = 130972896.

The previous prime is 131116477. The next prime is 131116501. The reversal of 131116487 is 784611131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784611131 = 71 ⋅11050861.

It is a cyclic number.

It is not a de Polignac number, because 131116487 - 2¹⁰ = 131115463 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 (131116457) 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, 70418 + ... + 72255.

It is an arithmetic number, because the mean of its divisors is an integer number (32815020).

Almost surely, 2^131116487 is an apocalyptic number.

131116487 is a deficient number, since it is larger than the sum of its proper divisors (143593).

131116487 is an equidigital number, since it uses as much as digits as its factorization.

131116487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143592.

The product of its digits is 4032, while the sum is 32.

The square root of 131116487 is about 11450.6107697363. The cubic root of 131116487 is about 508.0257997830.

The spelling of 131116487 in words is "one hundred thirty-one million, one hundred sixteen thousand, four hundred eighty-seven".