1005979 has 4 divisors (see below), whose sum is σ = 1083376. Its totient is φ = 928584.

The previous prime is 1005971. The next prime is 1005989. The reversal of 1005979 is 9795001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9795001 = 131 ⋅74771.

It is a cyclic number.

It is not a de Polignac number, because 1005979 - 2³ = 1005971 is a prime.

It is a super-3 number, since 3×1005979³ = 3054133377188786217, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005979.

It is not an unprimeable number, because it can be changed into a prime (1005971) 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, 38679 + ... + 38704.

It is an arithmetic number, because the mean of its divisors is an integer number (270844).

2^1005979 is an apocalyptic number.

1005979 is a deficient number, since it is larger than the sum of its proper divisors (77397).

1005979 is an equidigital number, since it uses as much as digits as its factorization.

1005979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77396.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 1005979 is about 1002.9850447539. The cubic root of 1005979 is about 100.1989041092.

The spelling of 1005979 in words is "one million, five thousand, nine hundred seventy-nine".