1684327345247 has 4 divisors (see below), whose sum is σ = 1684330013496. Its totient is φ = 1684324677000.

The previous prime is 1684327345237. The next prime is 1684327345249. The reversal of 1684327345247 is 7425437234861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1684327345247 - 2²⁰ = 1684326296671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1684327345192 and 1684327345201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684327345249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203372 + ... + 1846622.

It is an arithmetic number, because the mean of its divisors is an integer number (421082503374).

Almost surely, 2^{1684327345247} is an apocalyptic number.

1684327345247 is a deficient number, since it is larger than the sum of its proper divisors (2668249).

1684327345247 is a wasteful number, since it uses less digits than its factorization.

1684327345247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668248.

The product of its digits is 27095040, while the sum is 56.

The spelling of 1684327345247 in words is "one trillion, six hundred eighty-four billion, three hundred twenty-seven million, three hundred forty-five thousand, two hundred forty-seven".