1681672984 has 8 divisors (see below), whose sum is σ = 3153136860. Its totient is φ = 840836488.

The previous prime is 1681672981. The next prime is 1681673003. The reversal of 1681672984 is 4892761861.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681672981) 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 as a sum of consecutive naturals, namely, 105104554 + ... + 105104569.

Almost surely, 2^1681672984 is an apocalyptic number.

It is an amenable number.

1681672984 is a deficient number, since it is larger than the sum of its proper divisors (1471463876).

1681672984 is a wasteful number, since it uses less digits than its factorization.

1681672984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210209129 (or 210209125 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 52.

The square root of 1681672984 is about 41008.2063006906. The cubic root of 1681672984 is about 1189.1788662390.

The spelling of 1681672984 in words is "one billion, six hundred eighty-one million, six hundred seventy-two thousand, nine hundred eighty-four".