687017031143 has 4 divisors (see below), whose sum is σ = 687941684688. Its totient is φ = 686092377600.

The previous prime is 687017031139. The next prime is 687017031161. The reversal of 687017031143 is 341130710786.

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 687017031143 - 2² = 687017031139 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 687017031143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687017031443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462325658 + ... + 462327143.

It is an arithmetic number, because the mean of its divisors is an integer number (171985421172).

Almost surely, 2^687017031143 is an apocalyptic number.

687017031143 is a deficient number, since it is larger than the sum of its proper divisors (924653545).

687017031143 is an equidigital number, since it uses as much as digits as its factorization.

687017031143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924653544.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 687017031143 in words is "six hundred eighty-seven billion, seventeen million, thirty-one thousand, one hundred forty-three".