47705321 has 4 divisors (see below), whose sum is σ = 48994692. Its totient is φ = 46415952.

The previous prime is 47705309. The next prime is 47705327. The reversal of 47705321 is 12350774.

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 31416025 + 16289296 = 5605^2 + 4036^2 .

It is a cyclic number.

It is not a de Polignac number, because 47705321 - 2¹⁰ = 47704297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47705327) 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, 644630 + ... + 644703.

It is an arithmetic number, because the mean of its divisors is an integer number (12248673).

Almost surely, 2^47705321 is an apocalyptic number.

It is an amenable number.

47705321 is a deficient number, since it is larger than the sum of its proper divisors (1289371).

47705321 is a wasteful number, since it uses less digits than its factorization.

47705321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289370.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 47705321 is about 6906.9038649745. The cubic root of 47705321 is about 362.6788868964.

The spelling of 47705321 in words is "forty-seven million, seven hundred five thousand, three hundred twenty-one".