47279905 has 8 divisors (see below), whose sum is σ = 56879784. Its totient is φ = 37728000.

The previous prime is 47279899. The next prime is 47279963. The reversal of 47279905 is 50997274.

47279905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12787776 + 34492129 = 3576^2 + 5873^2 .

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

It is not a de Polignac number, because 47279905 - 2²³ = 38891297 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9786 + ... + 13795.

It is an arithmetic number, because the mean of its divisors is an integer number (7109973).

Almost surely, 2^47279905 is an apocalyptic number.

It is an amenable number.

47279905 is a deficient number, since it is larger than the sum of its proper divisors (9599879).

47279905 is a wasteful number, since it uses less digits than its factorization.

47279905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23987.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 47279905 is about 6876.0384670245. The cubic root of 47279905 is about 361.5975937046.

It can be divided in two parts, 47279 and 905, that added together give a palindrome (48184).

The spelling of 47279905 in words is "forty-seven million, two hundred seventy-nine thousand, nine hundred five".