687693 has 8 divisors (see below), whose sum is σ = 939456. Its totient is φ = 447200.

The previous prime is 687691. The next prime is 687707. The reversal of 687693 is 396786.

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 687693 - 2¹ = 687691 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 687693.

It is not an unprimeable number, because it can be changed into a prime (687691) 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, 2673 + ... + 2918.

It is an arithmetic number, because the mean of its divisors is an integer number (117432).

2⁶⁸⁷⁶⁹³ is an apocalyptic number.

It is an amenable number.

687693 is a deficient number, since it is larger than the sum of its proper divisors (251763).

687693 is a wasteful number, since it uses less digits than its factorization.

687693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5635.

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

The square root of 687693 is about 829.2725728010. The cubic root of 687693 is about 88.2669664859.

The spelling of 687693 in words is "six hundred eighty-seven thousand, six hundred ninety-three".