687963 has 4 divisors (see below), whose sum is σ = 917288. Its totient is φ = 458640.

The previous prime is 687961. The next prime is 687977. The reversal of 687963 is 369786.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 687963 - 2¹ = 687961 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687961) 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, 114658 + ... + 114663.

It is an arithmetic number, because the mean of its divisors is an integer number (229322).

2⁶⁸⁷⁹⁶³ is an apocalyptic number.

687963 is a deficient number, since it is larger than the sum of its proper divisors (229325).

687963 is a wasteful number, since it uses less digits than its factorization.

687963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229324.

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

The square root of 687963 is about 829.4353501027. The cubic root of 687963 is about 88.2785166799.

The spelling of 687963 in words is "six hundred eighty-seven thousand, nine hundred sixty-three".