1009979 has 4 divisors (see below), whose sum is σ = 1012800. Its totient is φ = 1007160.

The previous prime is 1009963. The next prime is 1009991. The reversal of 1009979 is 9799001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9799001 = 683 ⋅14347.

It is a cyclic number.

It is not a de Polignac number, because 1009979 - 2⁴ = 1009963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009909) 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, 779 + ... + 1620.

It is an arithmetic number, because the mean of its divisors is an integer number (253200).

2^1009979 is an apocalyptic number.

1009979 is a deficient number, since it is larger than the sum of its proper divisors (2821).

1009979 is an equidigital number, since it uses as much as digits as its factorization.

1009979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 1009979 is about 1004.9771141673. The cubic root of 1009979 is about 100.3315329775.

The spelling of 1009979 in words is "one million, nine thousand, nine hundred seventy-nine".