1679216984 has 8 divisors (see below), whose sum is σ = 3148531860. Its totient is φ = 839608488.

The previous prime is 1679216977. The next prime is 1679216989. The reversal of 1679216984 is 4896129761.

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 (1679216989) 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, 104951054 + ... + 104951069.

Almost surely, 2^1679216984 is an apocalyptic number.

It is an amenable number.

1679216984 is a deficient number, since it is larger than the sum of its proper divisors (1469314876).

1679216984 is a wasteful number, since it uses less digits than its factorization.

1679216984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209902129 (or 209902125 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 53.

The square root of 1679216984 is about 40978.2501334549. The cubic root of 1679216984 is about 1188.5996719314.

The spelling of 1679216984 in words is "one billion, six hundred seventy-nine million, two hundred sixteen thousand, nine hundred eighty-four".