131887887 has 8 divisors (see below), whose sum is σ = 186194736. Its totient is φ = 82753152.

The previous prime is 131887883. The next prime is 131887891. The reversal of 131887887 is 788788131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131887883) and next prime (131887891).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131887887 - 2² = 131887883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 2586037 = 131887887 / (1 + 3 + 1 + 8 + 8 + 7 + 8 + 8 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131887883) 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 7 ways as a sum of consecutive naturals, for example, 1292968 + ... + 1293069.

It is an arithmetic number, because the mean of its divisors is an integer number (23274342).

Almost surely, 2^131887887 is an apocalyptic number.

131887887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

131887887 is a deficient number, since it is larger than the sum of its proper divisors (54306849).

131887887 is a wasteful number, since it uses less digits than its factorization.

131887887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586057.

The product of its digits is 602112, while the sum is 51.

The square root of 131887887 is about 11484.2451645722. The cubic root of 131887887 is about 509.0201447685.

The spelling of 131887887 in words is "one hundred thirty-one million, eight hundred eighty-seven thousand, eight hundred eighty-seven".