7980305 has 4 divisors (see below), whose sum is σ = 9576372. Its totient is φ = 6384240.

The previous prime is 7980289. The next prime is 7980311. The reversal of 7980305 is 5030897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5030897 = 31 ⋅162287.

It can be written as a sum of positive squares in 2 ways, for example, as 2676496 + 5303809 = 1636^2 + 2303^2 .

It is not a de Polignac number, because 7980305 - 2⁴ = 7980289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 798026 + ... + 798035.

It is an arithmetic number, because the mean of its divisors is an integer number (2394093).

Almost surely, 2^7980305 is an apocalyptic number.

It is an amenable number.

7980305 is a deficient number, since it is larger than the sum of its proper divisors (1596067).

7980305 is a wasteful number, since it uses less digits than its factorization.

7980305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596066.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 7980305 is about 2824.9433622641. The cubic root of 7980305 is about 199.8357401304.

The spelling of 7980305 in words is "seven million, nine hundred eighty thousand, three hundred five".