1683521872 has 20 divisors (see below), whose sum is σ = 3286727136. Its totient is φ = 835334240.

The previous prime is 1683521863. The next prime is 1683521881. The reversal of 1683521872 is 2781253861.

It is an interprime number because it is at equal distance from previous prime (1683521863) and next prime (1683521881).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399508 + ... + 403699.

Almost surely, 2^1683521872 is an apocalyptic number.

It is an amenable number.

1683521872 is a deficient number, since it is larger than the sum of its proper divisors (1603205264).

1683521872 is a wasteful number, since it uses less digits than its factorization.

1683521872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803346 (or 803340 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 1683521872 is about 41030.7430105768. The cubic root of 1683521872 is about 1189.6145144077.

The spelling of 1683521872 in words is "one billion, six hundred eighty-three million, five hundred twenty-one thousand, eight hundred seventy-two".