1005679 has 2 divisors, whose sum is σ = 1005680. Its totient is φ = 1005678.

The previous prime is 1005677. The next prime is 1005701. The reversal of 1005679 is 9765001.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9765001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1005679 - 2¹ = 1005677 is a prime.

It is a super-2 number, since 2×1005679² = 2022780502082, which contains 22 as substring.

Together with 1005677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005677) 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 as a sum of consecutive naturals, namely, 502839 + 502840.

It is an arithmetic number, because the mean of its divisors is an integer number (502840).

2^1005679 is an apocalyptic number.

1005679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005679 is an equidigital number, since it uses as much as digits as its factorization.

1005679 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1005679 is about 1002.8354800265. The cubic root of 1005679 is about 100.1889427814.

It can be divided in two parts, 100567 and 9, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 1005679 in words is "one million, five thousand, six hundred seventy-nine".