679699 has 2 divisors, whose sum is σ = 679700. Its totient is φ = 679698.

The previous prime is 679691. The next prime is 679709. The reversal of 679699 is 996976.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679699 - 2³ = 679691 is a prime.

679699 is a lucky number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (679691) 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 as a sum of consecutive naturals, namely, 339849 + 339850.

It is an arithmetic number, because the mean of its divisors is an integer number (339850).

2⁶⁷⁹⁶⁹⁹ is an apocalyptic number.

679699 is a deficient number, since it is larger than the sum of its proper divisors (1).

679699 is an equidigital number, since it uses as much as digits as its factorization.

679699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 46.

The square root of 679699 is about 824.4385968646. The cubic root of 679699 is about 87.9236165701.

It can be divided in two parts, 679 and 699, that added together give a triangular number (1378 = T₅₂).

The spelling of 679699 in words is "six hundred seventy-nine thousand, six hundred ninety-nine".