679899 has 12 divisors (see below), whose sum is σ = 996968. Its totient is φ = 411840.

The previous prime is 679897. The next prime is 679907. The reversal of 679899 is 998976.

It is a happy number.

It is not a de Polignac number, because 679899 - 2¹ = 679897 is a prime.

It is a Duffinian number.

679899 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (679891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 574 + ... + 1299.

2⁶⁷⁹⁸⁹⁹ is an apocalyptic number.

679899 is a deficient number, since it is larger than the sum of its proper divisors (317069).

679899 is a wasteful number, since it uses less digits than its factorization.

679899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898 (or 1887 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 679899 is about 824.5598826040. The cubic root of 679899 is about 87.9322395041.

The spelling of 679899 in words is "six hundred seventy-nine thousand, eight hundred ninety-nine".