687157 has 8 divisors (see below), whose sum is σ = 737856. Its totient is φ = 637632.

The previous prime is 687151. The next prime is 687161. The reversal of 687157 is 751786.

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

It is a cyclic number.

It is not a de Polignac number, because 687157 - 2¹¹ = 685109 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 (687151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168 + ... + 1654.

It is an arithmetic number, because the mean of its divisors is an integer number (92232).

2⁶⁸⁷¹⁵⁷ is an apocalyptic number.

It is an amenable number.

687157 is a deficient number, since it is larger than the sum of its proper divisors (50699).

687157 is a wasteful number, since it uses less digits than its factorization.

687157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its digits is 11760, while the sum is 34.

The square root of 687157 is about 828.9493350018. The cubic root of 687157 is about 88.2440282509.

It can be divided in two parts, 68 and 7157, that added together give a square (7225 = 85²).

The spelling of 687157 in words is "six hundred eighty-seven thousand, one hundred fifty-seven".