87053131787 has 4 divisors (see below), whose sum is σ = 87265976040. Its totient is φ = 86840287536.

The previous prime is 87053131751. The next prime is 87053131817. The reversal of 87053131787 is 78713135078.

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 87053131787 - 2²⁰ = 87052083211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87053131717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106421513 + ... + 106422330.

It is an arithmetic number, because the mean of its divisors is an integer number (21816494010).

Almost surely, 2^87053131787 is an apocalyptic number.

87053131787 is a deficient number, since it is larger than the sum of its proper divisors (212844253).

87053131787 is a wasteful number, since it uses less digits than its factorization.

87053131787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212844252.

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 87053131787 in words is "eighty-seven billion, fifty-three million, one hundred thirty-one thousand, seven hundred eighty-seven".