1680173117 has 8 divisors (see below), whose sum is σ = 1922254656. Its totient is φ = 1438605792.

The previous prime is 1680173111. The next prime is 1680173177. The reversal of 1680173117 is 7113710861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1680173117 - 2⁴ = 1680173101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680173111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121523 + ... + 134640.

It is an arithmetic number, because the mean of its divisors is an integer number (240281832).

Almost surely, 2^1680173117 is an apocalyptic number.

It is an amenable number.

1680173117 is a deficient number, since it is larger than the sum of its proper divisors (242081539).

1680173117 is an equidigital number, since it uses as much as digits as its factorization.

1680173117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257107.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 1680173117 is about 40989.9148205995. The cubic root of 1680173117 is about 1188.8252222429.

Adding to 1680173117 its reverse (7113710861), we get a palindrome (8793883978).

The spelling of 1680173117 in words is "one billion, six hundred eighty million, one hundred seventy-three thousand, one hundred seventeen".