1705991011 has 2 divisors, whose sum is σ = 1705991012. Its totient is φ = 1705991010.

The previous prime is 1705991003. The next prime is 1705991069. The reversal of 1705991011 is 1101995071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1705991011 - 2³ = 1705991003 is a prime.

It is a super-2 number, since 2×1705991011² = 5820810659225604242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1705991081) 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, 852995505 + 852995506.

It is an arithmetic number, because the mean of its divisors is an integer number (852995506).

Almost surely, 2^1705991011 is an apocalyptic number.

1705991011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1705991011 is an equidigital number, since it uses as much as digits as its factorization.

1705991011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 34.

The square root of 1705991011 is about 41303.6440402055. The cubic root of 1705991011 is about 1194.8835425105.

The spelling of 1705991011 in words is "one billion, seven hundred five million, nine hundred ninety-one thousand, eleven".