686090587 has 16 divisors (see below), whose sum is σ = 853917120. Its totient is φ = 536735232.

The previous prime is 686090563. The next prime is 686090599. The reversal of 686090587 is 785090686.

It is a cyclic number.

It is not a de Polignac number, because 686090587 - 2²⁷ = 551872859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686090587.

It is not an unprimeable number, because it can be changed into a prime (686090507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34258 + ... + 50455.

It is an arithmetic number, because the mean of its divisors is an integer number (53369820).

Almost surely, 2^686090587 is an apocalyptic number.

686090587 is a deficient number, since it is larger than the sum of its proper divisors (167826533).

686090587 is a wasteful number, since it uses less digits than its factorization.

686090587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84822.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 686090587 is about 26193.3309641977. The cubic root of 686090587 is about 881.9835537852.

Subtracting 686090587 from its reverse (785090686), we obtain a palindrome (99000099).

The spelling of 686090587 in words is "six hundred eighty-six million, ninety thousand, five hundred eighty-seven".