1179979 has 2 divisors, whose sum is σ = 1179980. Its totient is φ = 1179978.
The previous prime is 1179977. The next prime is 1179989. The reversal of 1179979 is 9799711.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 1179979 - 21 = 1179977 is a prime.
Together with 1179977, it forms a pair of twin primes.
1179979 is a lucky number.
It is not a weakly prime, because it can be changed into another prime (1179973) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589989 + 589990.
It is an arithmetic number, because the mean of its divisors is an integer number (589990).
21179979 is an apocalyptic number.
1179979 is a deficient number, since it is larger than the sum of its proper divisors (1).
1179979 is an equidigital number, since it uses as much as digits as its factorization.
1179979 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 35721, while the sum is 43.
The square root of 1179979 is about 1086.2683830435. The cubic root of 1179979 is about 105.6715536533.
The spelling of 1179979 in words is "one million, one hundred seventy-nine thousand, nine hundred seventy-nine".
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