131186487 has 16 divisors (see below), whose sum is σ = 177914880. Its totient is φ = 85965600.

The previous prime is 131186483. The next prime is 131186509. The reversal of 131186487 is 784681131.

It is not a de Polignac number, because 131186487 - 2² = 131186483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131186483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91089 + ... + 92517.

It is an arithmetic number, because the mean of its divisors is an integer number (11119680).

Almost surely, 2^131186487 is an apocalyptic number.

131186487 is a deficient number, since it is larger than the sum of its proper divisors (46728393).

131186487 is a wasteful number, since it uses less digits than its factorization.

131186487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934.

The product of its digits is 32256, while the sum is 39.

The square root of 131186487 is about 11453.6669673952. Note that the first 3 decimals coincide. The cubic root of 131186487 is about 508.1161913631.

The spelling of 131186487 in words is "one hundred thirty-one million, one hundred eighty-six thousand, four hundred eighty-seven".