7941989305 has 4 divisors (see below), whose sum is σ = 9530387172. Its totient is φ = 6353591440.

The previous prime is 7941989269. The next prime is 7941989317. The reversal of 7941989305 is 5039891497.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3996641961 + 3945347344 = 63219^2 + 62812^2 .

It is not a de Polignac number, because 7941989305 - 2⁷ = 7941989177 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794198926 + ... + 794198935.

It is an arithmetic number, because the mean of its divisors is an integer number (2382596793).

Almost surely, 2^7941989305 is an apocalyptic number.

It is an amenable number.

7941989305 is a deficient number, since it is larger than the sum of its proper divisors (1588397867).

7941989305 is a wasteful number, since it uses less digits than its factorization.

7941989305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588397866.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 7941989305 is about 89117.8394318444. The cubic root of 7941989305 is about 1995.1540432515.

The spelling of 7941989305 in words is "seven billion, nine hundred forty-one million, nine hundred eighty-nine thousand, three hundred five".