679619 has 4 divisors (see below), whose sum is σ = 692496. Its totient is φ = 666744.

The previous prime is 679607. The next prime is 679633. The reversal of 679619 is 916976.

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 679619 - 2⁴ = 679603 is a prime.

It is a super-2 number, since 2×679619² = 923763970322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679639) 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, 6359 + ... + 6464.

It is an arithmetic number, because the mean of its divisors is an integer number (173124).

2⁶⁷⁹⁶¹⁹ is an apocalyptic number.

679619 is a deficient number, since it is larger than the sum of its proper divisors (12877).

679619 is a wasteful number, since it uses less digits than its factorization.

679619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12876.

The product of its digits is 20412, while the sum is 38.

The square root of 679619 is about 824.3900775725. The cubic root of 679619 is about 87.9201669229.

The spelling of 679619 in words is "six hundred seventy-nine thousand, six hundred nineteen".