87688531 has 8 divisors (see below), whose sum is σ = 100272384. Its totient is φ = 75118920.

The previous prime is 87688487. The next prime is 87688541. The reversal of 87688531 is 13588678.

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 87688531 - 2⁹ = 87688019 is a prime.

It is a super-2 number, since 2×87688531² = 15378556937875922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87688541) 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, 20466 + ... + 24376.

It is an arithmetic number, because the mean of its divisors is an integer number (12534048).

Almost surely, 2^87688531 is an apocalyptic number.

87688531 is a deficient number, since it is larger than the sum of its proper divisors (12583853).

87688531 is a wasteful number, since it uses less digits than its factorization.

87688531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7121.

The product of its digits is 322560, while the sum is 46.

The square root of 87688531 is about 9364.2154503194. The cubic root of 87688531 is about 444.2706243875.

The spelling of 87688531 in words is "eighty-seven million, six hundred eighty-eight thousand, five hundred thirty-one".