87531903 has 12 divisors (see below), whose sum is σ = 127359648. Its totient is φ = 57927840.

The previous prime is 87531839. The next prime is 87531911. The reversal of 87531903 is 30913578.

It is not a de Polignac number, because 87531903 - 2⁶ = 87531839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87531943) 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 11 ways as a sum of consecutive naturals, for example, 34263 + ... + 36728.

It is an arithmetic number, because the mean of its divisors is an integer number (10613304).

Almost surely, 2^87531903 is an apocalyptic number.

87531903 is a deficient number, since it is larger than the sum of its proper divisors (39827745).

87531903 is a wasteful number, since it uses less digits than its factorization.

87531903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71134 (or 71131 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 87531903 is about 9355.8485986040. The cubic root of 87531903 is about 444.0059501272.

The spelling of 87531903 in words is "eighty-seven million, five hundred thirty-one thousand, nine hundred three".