1720759049 has 2 divisors, whose sum is σ = 1720759050. Its totient is φ = 1720759048.

The previous prime is 1720759031. The next prime is 1720759063. The reversal of 1720759049 is 9409570271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1523497024 + 197262025 = 39032^2 + 14045^2 .

It is an emirp because it is prime and its reverse (9409570271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1720759049 is a prime.

It is a super-2 number, since 2×1720759049² = 5922023409430768802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1720759349) 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, 860379524 + 860379525.

It is an arithmetic number, because the mean of its divisors is an integer number (860379525).

Almost surely, 2^1720759049 is an apocalyptic number.

It is an amenable number.

1720759049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720759049 is an equidigital number, since it uses as much as digits as its factorization.

1720759049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 1720759049 is about 41482.0328455586. The cubic root of 1720759049 is about 1198.3215072482.

The spelling of 1720759049 in words is "one billion, seven hundred twenty million, seven hundred fifty-nine thousand, forty-nine".