687823161 has 8 divisors (see below), whose sum is σ = 965365920. Its totient is φ = 434414592.

The previous prime is 687823117. The next prime is 687823163. The reversal of 687823161 is 161328786.

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

It is not a de Polignac number, because 687823161 - 2⁷ = 687823033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687823163) 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, 6033480 + ... + 6033593.

It is an arithmetic number, because the mean of its divisors is an integer number (120670740).

Almost surely, 2^687823161 is an apocalyptic number.

It is an amenable number.

687823161 is a deficient number, since it is larger than the sum of its proper divisors (277542759).

687823161 is a wasteful number, since it uses less digits than its factorization.

687823161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12067095.

The product of its digits is 96768, while the sum is 42.

The square root of 687823161 is about 26226.3829187328. The cubic root of 687823161 is about 882.7253495514.

The spelling of 687823161 in words is "six hundred eighty-seven million, eight hundred twenty-three thousand, one hundred sixty-one".