679955 has 8 divisors (see below), whose sum is σ = 820800. Its totient is φ = 540736.

The previous prime is 679951. The next prime is 679957. The reversal of 679955 is 559976.

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

It is a cyclic number.

It is not a de Polignac number, because 679955 - 2² = 679951 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 911 + ... + 1479.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2⁶⁷⁹⁹⁵⁵ is an apocalyptic number.

679955 is a deficient number, since it is larger than the sum of its proper divisors (140845).

679955 is a wasteful number, since it uses less digits than its factorization.

679955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813.

The product of its digits is 85050, while the sum is 41.

The square root of 679955 is about 824.5938394143. The cubic root of 679955 is about 87.9346536226.

The spelling of 679955 in words is "six hundred seventy-nine thousand, nine hundred fifty-five".