131423687 has 4 divisors (see below), whose sum is σ = 131497296. Its totient is φ = 131350080.

The previous prime is 131423683. The next prime is 131423723. The reversal of 131423687 is 786324131.

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 131423687 - 2² = 131423683 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 (131423683) 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, 34058 + ... + 37719.

It is an arithmetic number, because the mean of its divisors is an integer number (32874324).

Almost surely, 2^131423687 is an apocalyptic number.

131423687 is a deficient number, since it is larger than the sum of its proper divisors (73609).

131423687 is an equidigital number, since it uses as much as digits as its factorization.

131423687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73608.

The product of its digits is 24192, while the sum is 35.

The square root of 131423687 is about 11464.0170533718. The cubic root of 131423687 is about 508.4222508137.

The spelling of 131423687 in words is "one hundred thirty-one million, four hundred twenty-three thousand, six hundred eighty-seven".