1205568979 has 2 divisors, whose sum is σ = 1205568980. Its totient is φ = 1205568978.

The previous prime is 1205568977. The next prime is 1205569003. The reversal of 1205568979 is 9798655021.

It is a weak prime.

It is an emirp because it is prime and its reverse (9798655021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1205568979 - 2¹ = 1205568977 is a prime.

It is a super-3 number, since 3×1205568979³ (a number of 28 digits) contains 333 as substring.

Together with 1205568977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1205568977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602784489 + 602784490.

It is an arithmetic number, because the mean of its divisors is an integer number (602784490).

Almost surely, 2^1205568979 is an apocalyptic number.

1205568979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205568979 is an equidigital number, since it uses as much as digits as its factorization.

1205568979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The square root of 1205568979 is about 34721.3043965805. The cubic root of 1205568979 is about 1064.2999003276.

The spelling of 1205568979 in words is "one billion, two hundred five million, five hundred sixty-eight thousand, nine hundred seventy-nine".