1213954579 has 2 divisors, whose sum is σ = 1213954580. Its totient is φ = 1213954578.

The previous prime is 1213954549. The next prime is 1213954589. The reversal of 1213954579 is 9754593121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213954579 - 2⁹ = 1213954067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213954549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606977289 + 606977290.

It is an arithmetic number, because the mean of its divisors is an integer number (606977290).

Almost surely, 2^1213954579 is an apocalyptic number.

1213954579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213954579 is an equidigital number, since it uses as much as digits as its factorization.

1213954579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 46.

The square root of 1213954579 is about 34841.8509697748. The cubic root of 1213954579 is about 1066.7618581822.

The spelling of 1213954579 in words is "one billion, two hundred thirteen million, nine hundred fifty-four thousand, five hundred seventy-nine".