1199829979 has 2 divisors, whose sum is σ = 1199829980. Its totient is φ = 1199829978.

The previous prime is 1199829977. The next prime is 1199830013. The reversal of 1199829979 is 9799289911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1199829979 - 2¹ = 1199829977 is a prime.

Together with 1199829977, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1199829979.

It is not a weakly prime, because it can be changed into another prime (1199829977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599914989 + 599914990.

It is an arithmetic number, because the mean of its divisors is an integer number (599914990).

Almost surely, 2^1199829979 is an apocalyptic number.

1199829979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199829979 is an equidigital number, since it uses as much as digits as its factorization.

1199829979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 64.

The square root of 1199829979 is about 34638.5620226937. The cubic root of 1199829979 is about 1062.6083795142.

The spelling of 1199829979 in words is "one billion, one hundred ninety-nine million, eight hundred twenty-nine thousand, nine hundred seventy-nine".