1061291779 has 2 divisors, whose sum is σ = 1061291780. Its totient is φ = 1061291778.

The previous prime is 1061291771. The next prime is 1061291807. The reversal of 1061291779 is 9771921601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1061291779 - 2³ = 1061291771 is a prime.

It is a super-2 number, since 2×1061291779² = 2252680480345969682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1061291771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530645889 + 530645890.

It is an arithmetic number, because the mean of its divisors is an integer number (530645890).

Almost surely, 2^1061291779 is an apocalyptic number.

1061291779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061291779 is an equidigital number, since it uses as much as digits as its factorization.

1061291779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 43.

The square root of 1061291779 is about 32577.4734901281. The cubic root of 1061291779 is about 1020.0268412134.

The spelling of 1061291779 in words is "one billion, sixty-one million, two hundred ninety-one thousand, seven hundred seventy-nine".