1791056779 has 2 divisors, whose sum is σ = 1791056780. Its totient is φ = 1791056778.

The previous prime is 1791056767. The next prime is 1791056789. The reversal of 1791056779 is 9776501971.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1791056779 - 2¹¹ = 1791054731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1791056749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895528389 + 895528390.

It is an arithmetic number, because the mean of its divisors is an integer number (895528390).

Almost surely, 2^1791056779 is an apocalyptic number.

1791056779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791056779 is an equidigital number, since it uses as much as digits as its factorization.

1791056779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 833490, while the sum is 52.

The square root of 1791056779 is about 42320.8787597800. The cubic root of 1791056779 is about 1214.4224431287.

The spelling of 1791056779 in words is "one billion, seven hundred ninety-one million, fifty-six thousand, seven hundred seventy-nine".