1274946779 has 2 divisors, whose sum is σ = 1274946780. Its totient is φ = 1274946778.

The previous prime is 1274946733. The next prime is 1274946791. The reversal of 1274946779 is 9776494721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1274946779 - 2²⁰ = 1273898203 is a prime.

It is not a weakly prime, because it can be changed into another prime (1274946709) 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, 637473389 + 637473390.

It is an arithmetic number, because the mean of its divisors is an integer number (637473390).

Almost surely, 2^1274946779 is an apocalyptic number.

1274946779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1274946779 is an equidigital number, since it uses as much as digits as its factorization.

1274946779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 56.

The square root of 1274946779 is about 35706.3968918736. The cubic root of 1274946779 is about 1084.3363547634.

The spelling of 1274946779 in words is "one billion, two hundred seventy-four million, nine hundred forty-six thousand, seven hundred seventy-nine".