1684964161 has 4 divisors (see below), whose sum is σ = 1689555712. Its totient is φ = 1680372612.

The previous prime is 1684964117. The next prime is 1684964179. The reversal of 1684964161 is 1614694861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1684964161 - 2⁷ = 1684964033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1684964191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2295225 + ... + 2295958.

It is an arithmetic number, because the mean of its divisors is an integer number (422388928).

Almost surely, 2^1684964161 is an apocalyptic number.

It is an amenable number.

1684964161 is a deficient number, since it is larger than the sum of its proper divisors (4591551).

1684964161 is an equidigital number, since it uses as much as digits as its factorization.

1684964161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591550.

The product of its digits is 248832, while the sum is 46.

The square root of 1684964161 is about 41048.3149593257. The cubic root of 1684964161 is about 1189.9541354166.

The spelling of 1684964161 in words is "one billion, six hundred eighty-four million, nine hundred sixty-four thousand, one hundred sixty-one".