131321730487 has 4 divisors (see below), whose sum is σ = 131405966640. Its totient is φ = 131237494336.

The previous prime is 131321730469. The next prime is 131321730503. The reversal of 131321730487 is 784037123131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131321730487 - 2²⁷ = 131187512759 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 (131321730467) 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, 42115738 + ... + 42118855.

It is an arithmetic number, because the mean of its divisors is an integer number (32851491660).

Almost surely, 2^131321730487 is an apocalyptic number.

131321730487 is a deficient number, since it is larger than the sum of its proper divisors (84236153).

131321730487 is an equidigital number, since it uses as much as digits as its factorization.

131321730487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84236152.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 131321730487 in words is "one hundred thirty-one billion, three hundred twenty-one million, seven hundred thirty thousand, four hundred eighty-seven".