47423909 has 8 divisors (see below), whose sum is σ = 51125592. Its totient is φ = 43729920.

The previous prime is 47423851. The next prime is 47423911. The reversal of 47423909 is 90932474.

47423909 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 1387684 + 46036225 = 1178^2 + 6785^2 .

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

It is not a de Polignac number, because 47423909 - 2⁸ = 47423653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47423609) by changing a digit.

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, 21749 + ... + 23829.

It is an arithmetic number, because the mean of its divisors is an integer number (6390699).

Almost surely, 2^47423909 is an apocalyptic number.

It is an amenable number.

47423909 is a deficient number, since it is larger than the sum of its proper divisors (3701683).

47423909 is a wasteful number, since it uses less digits than its factorization.

47423909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 47423909 is about 6886.5019422055. The cubic root of 47423909 is about 361.9643367083.

The spelling of 47423909 in words is "forty-seven million, four hundred twenty-three thousand, nine hundred nine".