131132987 has 4 divisors (see below), whose sum is σ = 133355640. Its totient is φ = 128910336.

The previous prime is 131132977. The next prime is 131132993. The reversal of 131132987 is 789231131.

It is a happy number.

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 131132987 - 2⁶ = 131132923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131132977) 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, 1111238 + ... + 1111355.

It is an arithmetic number, because the mean of its divisors is an integer number (33338910).

Almost surely, 2^131132987 is an apocalyptic number.

131132987 is a deficient number, since it is larger than the sum of its proper divisors (2222653).

131132987 is an equidigital number, since it uses as much as digits as its factorization.

131132987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222652.

The product of its digits is 9072, while the sum is 35.

The square root of 131132987 is about 11451.3312326559. The cubic root of 131132987 is about 508.0471092671.

The spelling of 131132987 in words is "one hundred thirty-one million, one hundred thirty-two thousand, nine hundred eighty-seven".