679121 has 4 divisors (see below), whose sum is σ = 708672.
Its totient is φ = 649572.
The previous prime is 679111. The next prime is 679123. The reversal of 679121 is 121976.
679121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-679121 is a prime.
It is a super-2 number, since 2×6791212 = 922410665282, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (679123) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14741 + ... + 14786.
It is an arithmetic number, because the mean of its divisors is an integer number (177168).
2679121 is an apocalyptic number.
It is an amenable number.
679121 is a deficient number, since it is larger than the sum of its proper divisors (29551).
679121 is a wasteful number, since it uses less digits than its factorization.
679121 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 29550.
The product of its digits is 756, while the sum is 26.
The square root of 679121 is about 824.0879807399.
The cubic root of 679121 is about 87.8986867789.
The spelling of 679121 in words is "six hundred seventy-nine thousand, one hundred twenty-one".