687193142 has 8 divisors (see below), whose sum is σ = 1091424456. Its totient is φ = 323384992.

The previous prime is 687193141. The next prime is 687193181. The reversal of 687193142 is 241391786.

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

It is a self number, because there is not a number n which added to its sum of digits gives 687193142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687193141) 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, 10105748 + ... + 10105815.

It is an arithmetic number, because the mean of its divisors is an integer number (136428057).

Almost surely, 2^687193142 is an apocalyptic number.

687193142 is a deficient number, since it is larger than the sum of its proper divisors (404231314).

687193142 is a wasteful number, since it uses less digits than its factorization.

687193142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20211582.

The product of its digits is 72576, while the sum is 41.

The square root of 687193142 is about 26214.3689986999. The cubic root of 687193142 is about 882.4557533049.

The spelling of 687193142 in words is "six hundred eighty-seven million, one hundred ninety-three thousand, one hundred forty-two".