131035987 has 4 divisors (see below), whose sum is σ = 132991816. Its totient is φ = 129080160.

The previous prime is 131035963. The next prime is 131036021. The reversal of 131035987 is 789530131.

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 131035987 - 2¹¹ = 131033939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131035087) 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, 977814 + ... + 977947.

It is an arithmetic number, because the mean of its divisors is an integer number (33247954).

Almost surely, 2^131035987 is an apocalyptic number.

131035987 is a deficient number, since it is larger than the sum of its proper divisors (1955829).

131035987 is an equidigital number, since it uses as much as digits as its factorization.

131035987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955828.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 131035987 is about 11447.0951337010. The cubic root of 131035987 is about 507.9218096844.

The spelling of 131035987 in words is "one hundred thirty-one million, thirty-five thousand, nine hundred eighty-seven".