131266887 has 4 divisors (see below), whose sum is σ = 175022520. Its totient is φ = 87511256.

The previous prime is 131266873. The next prime is 131266897. The reversal of 131266887 is 788662131.

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 131266887 - 2¹⁶ = 131201351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131266897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21877812 + ... + 21877817.

It is an arithmetic number, because the mean of its divisors is an integer number (43755630).

Almost surely, 2^131266887 is an apocalyptic number.

131266887 is a deficient number, since it is larger than the sum of its proper divisors (43755633).

131266887 is an equidigital number, since it uses as much as digits as its factorization.

131266887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43755632.

The product of its digits is 96768, while the sum is 42.

The square root of 131266887 is about 11457.1762227872. The cubic root of 131266887 is about 508.2199728826.

The spelling of 131266887 in words is "one hundred thirty-one million, two hundred sixty-six thousand, eight hundred eighty-seven".