1680879879 has 72 divisors (see below), whose sum is σ = 3013854480. Its totient is φ = 896942592.

The previous prime is 1680879869. The next prime is 1680879917. The reversal of 1680879879 is 9789780861.

It is not a de Polignac number, because 1680879879 - 2⁷ = 1680879751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680879869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1041277 + ... + 1042889.

It is an arithmetic number, because the mean of its divisors is an integer number (41859090).

Almost surely, 2^1680879879 is an apocalyptic number.

1680879879 is a deficient number, since it is larger than the sum of its proper divisors (1332974601).

1680879879 is a wasteful number, since it uses less digits than its factorization.

1680879879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The square root of 1680879879 is about 40998.5350835856. The cubic root of 1680879879 is about 1188.9918913198.

The spelling of 1680879879 in words is "one billion, six hundred eighty million, eight hundred seventy-nine thousand, eight hundred seventy-nine".