687103 has 4 divisors (see below), whose sum is σ = 694008. Its totient is φ = 680200.

The previous prime is 687101. The next prime is 687107. The reversal of 687103 is 301786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301786 = 2 ⋅150893.

It is a cyclic number.

It is not a de Polignac number, because 687103 - 2¹ = 687101 is a prime.

It is a super-2 number, since 2×687103² = 944221065218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3301 + ... + 3502.

It is an arithmetic number, because the mean of its divisors is an integer number (173502).

2⁶⁸⁷¹⁰³ is an apocalyptic number.

687103 is a deficient number, since it is larger than the sum of its proper divisors (6905).

687103 is a wasteful number, since it uses less digits than its factorization.

687103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6904.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 687103 is about 828.9167630106. The cubic root of 687103 is about 88.2417166480.

Adding to 687103 its reverse (301786), we get a palindrome (988889).

The spelling of 687103 in words is "six hundred eighty-seven thousand, one hundred three".