131882987 has 4 divisors (see below), whose sum is σ = 134689056. Its totient is φ = 129076920.

The previous prime is 131882969. The next prime is 131882999. The reversal of 131882987 is 789288131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789288131 = 79 ⋅9990989.

It is a cyclic number.

It is not a de Polignac number, because 131882987 - 2¹⁶ = 131817451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 2806021 = 131882987 / (1 + 3 + 1 + 8 + 8 + 2 + 9 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131882887) 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, 1402964 + ... + 1403057.

It is an arithmetic number, because the mean of its divisors is an integer number (33672264).

Almost surely, 2^131882987 is an apocalyptic number.

131882987 is a deficient number, since it is larger than the sum of its proper divisors (2806069).

131882987 is an equidigital number, since it uses as much as digits as its factorization.

131882987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806068.

The product of its digits is 193536, while the sum is 47.

The square root of 131882987 is about 11484.0318268455. The cubic root of 131882987 is about 509.0138408548.

The spelling of 131882987 in words is "one hundred thirty-one million, eight hundred eighty-two thousand, nine hundred eighty-seven".