1680802279 has 8 divisors (see below), whose sum is σ = 1821626240. Its totient is φ = 1541625696.

The previous prime is 1680802273. The next prime is 1680802283. The reversal of 1680802279 is 9722080861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1680802279 - 2²³ = 1672413671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680802273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409719 + ... + 413800.

It is an arithmetic number, because the mean of its divisors is an integer number (227703280).

Almost surely, 2^1680802279 is an apocalyptic number.

1680802279 is a deficient number, since it is larger than the sum of its proper divisors (140823961).

1680802279 is a wasteful number, since it uses less digits than its factorization.

1680802279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823689.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1680802279 is about 40997.5886973856. The cubic root of 1680802279 is about 1188.9735939205.

The spelling of 1680802279 in words is "one billion, six hundred eighty million, eight hundred two thousand, two hundred seventy-nine".