684745617 has 8 divisors (see below), whose sum is σ = 961046560. Its totient is φ = 432470880.

The previous prime is 684745613. The next prime is 684745657. The reversal of 684745617 is 716547486.

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

It is not a de Polignac number, because 684745617 - 2² = 684745613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684745613) 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, 6006484 + ... + 6006597.

It is an arithmetic number, because the mean of its divisors is an integer number (120130820).

Almost surely, 2^684745617 is an apocalyptic number.

It is an amenable number.

684745617 is a deficient number, since it is larger than the sum of its proper divisors (276300943).

684745617 is a wasteful number, since it uses less digits than its factorization.

684745617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013103.

The product of its digits is 1128960, while the sum is 48.

The square root of 684745617 is about 26167.6444679302. The cubic root of 684745617 is about 881.4068479132.

The spelling of 684745617 in words is "six hundred eighty-four million, seven hundred forty-five thousand, six hundred seventeen".