679711 has 4 divisors (see below), whose sum is σ = 719712. Its totient is φ = 639712.

The previous prime is 679709. The next prime is 679733. The reversal of 679711 is 117976.

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

It is a cyclic number.

It is not a de Polignac number, because 679711 - 2¹ = 679709 is a prime.

679711 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679741) 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, 19975 + ... + 20008.

It is an arithmetic number, because the mean of its divisors is an integer number (179928).

2⁶⁷⁹⁷¹¹ is an apocalyptic number.

679711 is a deficient number, since it is larger than the sum of its proper divisors (40001).

679711 is a wasteful number, since it uses less digits than its factorization.

679711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40000.

The product of its digits is 2646, while the sum is 31.

The square root of 679711 is about 824.4458745121. The cubic root of 679711 is about 87.9241339938.

The spelling of 679711 in words is "six hundred seventy-nine thousand, seven hundred eleven".