679513 has 4 divisors (see below), whose sum is σ = 692388. Its totient is φ = 666640.

The previous prime is 679501. The next prime is 679517. The reversal of 679513 is 315976.

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

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 446224 = 483^2 + 668^2 .

It is a cyclic number.

It is not a de Polignac number, because 679513 - 2¹⁷ = 548441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679517) 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 3 ways as a sum of consecutive naturals, for example, 6358 + ... + 6463.

It is an arithmetic number, because the mean of its divisors is an integer number (173097).

2⁶⁷⁹⁵¹³ is an apocalyptic number.

It is an amenable number.

679513 is a deficient number, since it is larger than the sum of its proper divisors (12875).

679513 is a wasteful number, since it uses less digits than its factorization.

679513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12874.

The product of its digits is 5670, while the sum is 31.

The square root of 679513 is about 824.3257851117. The cubic root of 679513 is about 87.9155957233.

The spelling of 679513 in words is "six hundred seventy-nine thousand, five hundred thirteen".