679919 has 2 divisors, whose sum is σ = 679920. Its totient is φ = 679918.

The previous prime is 679909. The next prime is 679933. The reversal of 679919 is 919976.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679919 - 2¹² = 675823 is a prime.

It is a super-2 number, since 2×679919² = 924579693122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339959 + 339960.

It is an arithmetic number, because the mean of its divisors is an integer number (339960).

2⁶⁷⁹⁹¹⁹ is an apocalyptic number.

679919 is a deficient number, since it is larger than the sum of its proper divisors (1).

679919 is an equidigital number, since it uses as much as digits as its factorization.

679919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 41.

The square root of 679919 is about 824.5720101968. The cubic root of 679919 is about 87.9331017045.

The spelling of 679919 in words is "six hundred seventy-nine thousand, nine hundred nineteen".