1680284217 has 8 divisors (see below), whose sum is σ = 2262130624. Its totient is φ = 1109313648.

The previous prime is 1680284189. The next prime is 1680284231. The reversal of 1680284217 is 7124820861.

It is a happy number.

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

It is not a de Polignac number, because 1680284217 - 2⁶ = 1680284153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680284257) 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, 2718598 + ... + 2719215.

It is an arithmetic number, because the mean of its divisors is an integer number (282766328).

Almost surely, 2^1680284217 is an apocalyptic number.

It is an amenable number.

1680284217 is a deficient number, since it is larger than the sum of its proper divisors (581846407).

1680284217 is a wasteful number, since it uses less digits than its factorization.

1680284217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437919.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 1680284217 is about 40991.2700096008. The cubic root of 1680284217 is about 1188.8514250132.

The spelling of 1680284217 in words is "one billion, six hundred eighty million, two hundred eighty-four thousand, two hundred seventeen".