1680001481 has 2 divisors, whose sum is σ = 1680001482. Its totient is φ = 1680001480.

The previous prime is 1680001441. The next prime is 1680001517. The reversal of 1680001481 is 1841000861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1530061456 + 149940025 = 39116^2 + 12245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680001481 - 2¹⁸ = 1679739337 is a prime.

It is a super-2 number, since 2×1680001481² = 5644809952324386722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1680001441) 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, 840000740 + 840000741.

It is an arithmetic number, because the mean of its divisors is an integer number (840000741).

Almost surely, 2^1680001481 is an apocalyptic number.

It is an amenable number.

1680001481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680001481 is an equidigital number, since it uses as much as digits as its factorization.

1680001481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 1680001481 is about 40987.8211301845. The cubic root of 1680001481 is about 1188.7847398759.

The spelling of 1680001481 in words is "one billion, six hundred eighty million, one thousand, four hundred eighty-one".