13131743187 has 4 divisors (see below), whose sum is σ = 17508990920. Its totient is φ = 8754495456.

The previous prime is 13131743173. The next prime is 13131743197. The reversal of 13131743187 is 78134713131.

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

It is not a de Polignac number, because 13131743187 - 2⁸ = 13131742931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13131743117) 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, 2188623862 + ... + 2188623867.

It is an arithmetic number, because the mean of its divisors is an integer number (4377247730).

Almost surely, 2^13131743187 is an apocalyptic number.

13131743187 is a deficient number, since it is larger than the sum of its proper divisors (4377247733).

13131743187 is an equidigital number, since it uses as much as digits as its factorization.

13131743187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377247732.

The product of its digits is 42336, while the sum is 39.

The spelling of 13131743187 in words is "thirteen billion, one hundred thirty-one million, seven hundred forty-three thousand, one hundred eighty-seven".