9131391740087 has 4 divisors (see below), whose sum is σ = 9145375495320. Its totient is φ = 9117407984856.

The previous prime is 9131391740039. The next prime is 9131391740089. The reversal of 9131391740087 is 7800471931319.

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 9131391740087 - 2¹⁴ = 9131391723703 is a prime.

It is a super-2 number, since 2×9131391740087² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9131391740089) 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, 6991876637 + ... + 6991877942.

It is an arithmetic number, because the mean of its divisors is an integer number (2286343873830).

Almost surely, 2^{9131391740087} is an apocalyptic number.

9131391740087 is a deficient number, since it is larger than the sum of its proper divisors (13983755233).

9131391740087 is a wasteful number, since it uses less digits than its factorization.

9131391740087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13983755232.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 9131391740087 in words is "nine trillion, one hundred thirty-one billion, three hundred ninety-one million, seven hundred forty thousand, eighty-seven".