1680817941 has 12 divisors (see below), whose sum is σ = 2648561760. Its totient is φ = 1018677480.

The previous prime is 1680817913. The next prime is 1680817967. The reversal of 1680817941 is 1497180861.

It is a happy number.

It is not a de Polignac number, because 1680817941 - 2⁶ = 1680817877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680817741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8488881 + ... + 8489078.

It is an arithmetic number, because the mean of its divisors is an integer number (220713480).

Almost surely, 2^1680817941 is an apocalyptic number.

1680817941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1680817941 is a deficient number, since it is larger than the sum of its proper divisors (967743819).

1680817941 is a wasteful number, since it uses less digits than its factorization.

1680817941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16977976 (or 16977973 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 1680817941 is about 40997.7797081744. The cubic root of 1680817941 is about 1188.9772869281.

The spelling of 1680817941 in words is "one billion, six hundred eighty million, eight hundred seventeen thousand, nine hundred forty-one".