47523921 has 16 divisors (see below), whose sum is σ = 67645440. Its totient is φ = 29589840.

The previous prime is 47523913. The next prime is 47523967. The reversal of 47523921 is 12932574.

It is not a de Polignac number, because 47523921 - 2³ = 47523913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47523991) 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 in 15 ways as a sum of consecutive naturals, for example, 1825 + ... + 9918.

It is an arithmetic number, because the mean of its divisors is an integer number (4227840).

Almost surely, 2^47523921 is an apocalyptic number.

It is an amenable number.

47523921 is a deficient number, since it is larger than the sum of its proper divisors (20121519).

47523921 is a wasteful number, since it uses less digits than its factorization.

47523921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11836.

The product of its digits is 15120, while the sum is 33.

The square root of 47523921 is about 6893.7595693497. The cubic root of 47523921 is about 362.2186061960.

The spelling of 47523921 in words is "forty-seven million, five hundred twenty-three thousand, nine hundred twenty-one".