687075863 has 4 divisors (see below), whose sum is σ = 687227568. Its totient is φ = 686924160.

The previous prime is 687075841. The next prime is 687075871. The reversal of 687075863 is 368570786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368570786 = 2 ⋅184285393.

It is a cyclic number.

It is not a de Polignac number, because 687075863 - 2²² = 682881559 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 (687075463) 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, 68843 + ... + 78188.

It is an arithmetic number, because the mean of its divisors is an integer number (171806892).

Almost surely, 2^687075863 is an apocalyptic number.

687075863 is a deficient number, since it is larger than the sum of its proper divisors (151705).

687075863 is a wasteful number, since it uses less digits than its factorization.

687075863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151704.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 687075863 is about 26212.1319812029. The cubic root of 687075863 is about 882.4055493617.

The spelling of 687075863 in words is "six hundred eighty-seven million, seventy-five thousand, eight hundred sixty-three".