682987 has 4 divisors (see below), whose sum is σ = 685216. Its totient is φ = 680760.

The previous prime is 682967. The next prime is 683003. The reversal of 682987 is 789286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789286 = 2 ⋅394643.

It is a cyclic number.

It is not a de Polignac number, because 682987 - 2¹⁹ = 158699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (682967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564 + ... + 1297.

It is an arithmetic number, because the mean of its divisors is an integer number (171304).

2⁶⁸²⁹⁸⁷ is an apocalyptic number.

682987 is a deficient number, since it is larger than the sum of its proper divisors (2229).

682987 is a wasteful number, since it uses less digits than its factorization.

682987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228.

The product of its digits is 48384, while the sum is 40.

The square root of 682987 is about 826.4302753409. The cubic root of 682987 is about 88.0651635117.

The spelling of 682987 in words is "six hundred eighty-two thousand, nine hundred eighty-seven".