687101 has 2 divisors, whose sum is σ = 687102. Its totient is φ = 687100.

The previous prime is 687083. The next prime is 687107. The reversal of 687101 is 101786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 63001 = 790^2 + 251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343550 + 343551.

It is an arithmetic number, because the mean of its divisors is an integer number (343551).

2⁶⁸⁷¹⁰¹ is an apocalyptic number.

It is an amenable number.

687101 is a deficient number, since it is larger than the sum of its proper divisors (1).

687101 is an equidigital number, since it uses as much as digits as its factorization.

687101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 687101 is about 828.9155566160. The cubic root of 687101 is about 88.2416310307.

Adding to 687101 its reverse (101786), we get a palindrome (788887).

The spelling of 687101 in words is "six hundred eighty-seven thousand, one hundred one".