1684253487 has 16 divisors (see below), whose sum is σ = 2567136512. Its totient is φ = 962184960.

The previous prime is 1684253479. The next prime is 1684253491. The reversal of 1684253487 is 7843524861.

It is not a de Polignac number, because 1684253487 - 2³ = 1684253479 is a prime.

It is a super-3 number, since 3×1684253487³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684253447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103308 + ... + 118494.

It is an arithmetic number, because the mean of its divisors is an integer number (160446032).

Almost surely, 2^1684253487 is an apocalyptic number.

1684253487 is a deficient number, since it is larger than the sum of its proper divisors (882883025).

1684253487 is a wasteful number, since it uses less digits than its factorization.

1684253487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20478.

The product of its digits is 1290240, while the sum is 48.

The square root of 1684253487 is about 41039.6574912608. The cubic root of 1684253487 is about 1189.7868146695.

The spelling of 1684253487 in words is "one billion, six hundred eighty-four million, two hundred fifty-three thousand, four hundred eighty-seven".