679898 has 8 divisors (see below), whose sum is σ = 1079892. Its totient is φ = 319936.

The previous prime is 679897. The next prime is 679907. The reversal of 679898 is 898976.

It can be written as a sum of positive squares in 2 ways, for example, as 597529 + 82369 = 773^2 + 287^2 .

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

It is a super-2 number, since 2×679898² = 924522580808, which contains 22 as substring.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9965 + ... + 10032.

2⁶⁷⁹⁸⁹⁸ is an apocalyptic number.

679898 is a deficient number, since it is larger than the sum of its proper divisors (399994).

679898 is a wasteful number, since it uses less digits than its factorization.

679898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20016.

The product of its digits is 217728, while the sum is 47.

The square root of 679898 is about 824.5592762197. The cubic root of 679898 is about 87.9321963936.

The spelling of 679898 in words is "six hundred seventy-nine thousand, eight hundred ninety-eight".