47009923 has 2 divisors, whose sum is σ = 47009924. Its totient is φ = 47009922.

The previous prime is 47009909. The next prime is 47009927. The reversal of 47009923 is 32990074.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47009923 - 2⁵ = 47009891 is a prime.

It is not a weakly prime, because it can be changed into another prime (47009927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23504961 + 23504962.

It is an arithmetic number, because the mean of its divisors is an integer number (23504962).

Almost surely, 2^47009923 is an apocalyptic number.

47009923 is a deficient number, since it is larger than the sum of its proper divisors (1).

47009923 is an equidigital number, since it uses as much as digits as its factorization.

47009923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 47009923 is about 6856.3782713616. The cubic root of 47009923 is about 360.9080036602.

Adding to 47009923 its reverse (32990074), we get a palindrome (79999997).

The spelling of 47009923 in words is "forty-seven million, nine thousand, nine hundred twenty-three".