87971503 has 4 divisors (see below), whose sum is σ = 88664320. Its totient is φ = 87278688.

The previous prime is 87971489. The next prime is 87971551. The reversal of 87971503 is 30517978.

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 87971503 - 2²¹ = 85874351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87971563) 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 3 ways as a sum of consecutive naturals, for example, 346218 + ... + 346471.

It is an arithmetic number, because the mean of its divisors is an integer number (22166080).

Almost surely, 2^87971503 is an apocalyptic number.

87971503 is a deficient number, since it is larger than the sum of its proper divisors (692817).

87971503 is a wasteful number, since it uses less digits than its factorization.

87971503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692816.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 87971503 is about 9379.3125014577. The cubic root of 87971503 is about 444.7480002328.

The spelling of 87971503 in words is "eighty-seven million, nine hundred seventy-one thousand, five hundred three".