679797 has 6 divisors (see below), whose sum is σ = 981942. Its totient is φ = 453192.

The previous prime is 679793. The next prime is 679807. The reversal of 679797 is 797976.

It can be written as a sum of positive squares in only one way, i.e., 617796 + 62001 = 786^2 + 249^2 .

It is not a de Polignac number, because 679797 - 2² = 679793 is a prime.

It is a super-2 number, since 2×679797² = 924247922418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679793) 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 5 ways as a sum of consecutive naturals, for example, 37758 + ... + 37775.

It is an arithmetic number, because the mean of its divisors is an integer number (163657).

2⁶⁷⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

679797 is a deficient number, since it is larger than the sum of its proper divisors (302145).

679797 is a wasteful number, since it uses less digits than its factorization.

679797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75539 (or 75536 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 679797 is about 824.4980291062. The cubic root of 679797 is about 87.9278420191.

The spelling of 679797 in words is "six hundred seventy-nine thousand, seven hundred ninety-seven".