87511287 has 8 divisors (see below), whose sum is σ = 116987904. Its totient is φ = 58187768.

The previous prime is 87511247. The next prime is 87511289. The reversal of 87511287 is 78211578.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87511287 - 2¹⁰ = 87510263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87511289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36933 + ... + 39230.

It is an arithmetic number, because the mean of its divisors is an integer number (14623488).

Almost surely, 2^87511287 is an apocalyptic number.

87511287 is a deficient number, since it is larger than the sum of its proper divisors (29476617).

87511287 is a wasteful number, since it uses less digits than its factorization.

87511287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76549.

The product of its digits is 31360, while the sum is 39.

The square root of 87511287 is about 9354.7467630075. The cubic root of 87511287 is about 443.9710891410.

The spelling of 87511287 in words is "eighty-seven million, five hundred eleven thousand, two hundred eighty-seven".