87501871 has 4 divisors (see below), whose sum is σ = 90324544. Its totient is φ = 84679200.

The previous prime is 87501847. The next prime is 87501893. The reversal of 87501871 is 17810578.

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 87501871 - 2¹¹ = 87499823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87501871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87501371) 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, 1411290 + ... + 1411351.

It is an arithmetic number, because the mean of its divisors is an integer number (22581136).

Almost surely, 2^87501871 is an apocalyptic number.

87501871 is a deficient number, since it is larger than the sum of its proper divisors (2822673).

87501871 is a wasteful number, since it uses less digits than its factorization.

87501871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822672.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 87501871 is about 9354.2434755570. The cubic root of 87501871 is about 443.9551651695.

The spelling of 87501871 in words is "eighty-seven million, five hundred one thousand, eight hundred seventy-one".