1681730051 has 2 divisors, whose sum is σ = 1681730052. Its totient is φ = 1681730050.

The previous prime is 1681730023. The next prime is 1681730101. The reversal of 1681730051 is 1500371861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1681730051 - 2¹⁴ = 1681713667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1681730551) 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, 840865025 + 840865026.

It is an arithmetic number, because the mean of its divisors is an integer number (840865026).

Almost surely, 2^1681730051 is an apocalyptic number.

1681730051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681730051 is an equidigital number, since it uses as much as digits as its factorization.

1681730051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1681730051 is about 41008.9020945453. The cubic root of 1681730051 is about 1189.1923175468.

The spelling of 1681730051 in words is "one billion, six hundred eighty-one million, seven hundred thirty thousand, fifty-one".