687369 has 4 divisors (see below), whose sum is σ = 916496. Its totient is φ = 458244.

The previous prime is 687359. The next prime is 687383. The reversal of 687369 is 963786.

687369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 687369 - 2¹² = 683273 is a prime.

It is a super-2 number, since 2×687369² = 944952284322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687359) 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, 114559 + ... + 114564.

It is an arithmetic number, because the mean of its divisors is an integer number (229124).

2⁶⁸⁷³⁶⁹ is an apocalyptic number.

It is an amenable number.

687369 is a deficient number, since it is larger than the sum of its proper divisors (229127).

687369 is a wasteful number, since it uses less digits than its factorization.

687369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229126.

The product of its digits is 54432, while the sum is 39.

The square root of 687369 is about 829.0771978531. The cubic root of 687369 is about 88.2531022618.

The spelling of 687369 in words is "six hundred eighty-seven thousand, three hundred sixty-nine".