1679005 has 8 divisors (see below), whose sum is σ = 2133432. Its totient is φ = 1264128.

The previous prime is 1678993. The next prime is 1679009. The reversal of 1679005 is 5009761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 205209 + 1473796 = 453^2 + 1214^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1679005 - 2⁷ = 1678877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679009) 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 7 ways as a sum of consecutive naturals, for example, 9792 + ... + 9961.

It is an arithmetic number, because the mean of its divisors is an integer number (266679).

2^1679005 is an apocalyptic number.

It is an amenable number.

1679005 is a deficient number, since it is larger than the sum of its proper divisors (454427).

1679005 is a wasteful number, since it uses less digits than its factorization.

1679005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19775.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 1679005 is about 1295.7642532498. The cubic root of 1679005 is about 118.8549653635.

The spelling of 1679005 in words is "one million, six hundred seventy-nine thousand, five".