679749 has 8 divisors (see below), whose sum is σ = 1035840. Its totient is φ = 388416.

The previous prime is 679747. The next prime is 679751. The reversal of 679749 is 947976.

It is an interprime number because it is at equal distance from previous prime (679747) and next prime (679751).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 679749 - 2¹ = 679747 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 679749.

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16164 + ... + 16205.

It is an arithmetic number, because the mean of its divisors is an integer number (129480).

2⁶⁷⁹⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

679749 is a deficient number, since it is larger than the sum of its proper divisors (356091).

679749 is a wasteful number, since it uses less digits than its factorization.

679749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32379.

The product of its digits is 95256, while the sum is 42.

The square root of 679749 is about 824.4689199721. The cubic root of 679749 is about 87.9257724622.

The spelling of 679749 in words is "six hundred seventy-nine thousand, seven hundred forty-nine".