1680272079 has 4 divisors (see below), whose sum is σ = 2240362776. Its totient is φ = 1120181384.

The previous prime is 1680272059. The next prime is 1680272101. The reversal of 1680272079 is 9702720861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1680272079 - 2⁵ = 1680272047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1680272079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680272059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280045344 + ... + 280045349.

It is an arithmetic number, because the mean of its divisors is an integer number (560090694).

Almost surely, 2^1680272079 is an apocalyptic number.

1680272079 is a deficient number, since it is larger than the sum of its proper divisors (560090697).

1680272079 is an equidigital number, since it uses as much as digits as its factorization.

1680272079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560090696.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1680272079 is about 40991.1219534182. The cubic root of 1680272079 is about 1188.8485623401.

The spelling of 1680272079 in words is "one billion, six hundred eighty million, two hundred seventy-two thousand, seventy-nine".