7947365905 has 16 divisors (see below), whose sum is σ = 9605427984. Its totient is φ = 6312234240.

The previous prime is 7947365849. The next prime is 7947365911. The reversal of 7947365905 is 5095637497.

It is a Cunningham number, because it is equal to 89148²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 7947365904 = 1^2 + 89148^2 .

It is not a de Polignac number, because 7947365905 - 2²⁷ = 7813148177 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 15 ways as a sum of consecutive naturals, for example, 1168615 + ... + 1175395.

It is an arithmetic number, because the mean of its divisors is an integer number (600339249).

Almost surely, 2^7947365905 is an apocalyptic number.

It is an amenable number.

7947365905 is a deficient number, since it is larger than the sum of its proper divisors (1658062079).

7947365905 is a wasteful number, since it uses less digits than its factorization.

7947365905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8436.

The product of its (nonzero) digits is 7144200, while the sum is 55.

The square root of 7947365905 is about 89148.0000056087. Note that the first 5 decimals coincide. The cubic root of 7947365905 is about 1995.6041708382.

The spelling of 7947365905 in words is "seven billion, nine hundred forty-seven million, three hundred sixty-five thousand, nine hundred five".