47529921 has 12 divisors (see below), whose sum is σ = 64954032. Its totient is φ = 30898728.

The previous prime is 47529901. The next prime is 47529931. The reversal of 47529921 is 12992574.

It is not a de Polignac number, because 47529921 - 2⁶ = 47529857 is a prime.

Its product of digits (45360) is a multiple of the sum of its prime factors (1260).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47529921.

It is not an unprimeable number, because it can be changed into a prime (47529901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78000 + ... + 78606.

It is an arithmetic number, because the mean of its divisors is an integer number (5412836).

Almost surely, 2^47529921 is an apocalyptic number.

It is an amenable number.

47529921 is a deficient number, since it is larger than the sum of its proper divisors (17424111).

47529921 is an frugal number, since it uses more digits than its factorization.

47529921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260 (or 653 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 47529921 is about 6894.1947318015. The cubic root of 47529921 is about 362.2338491876.

The spelling of 47529921 in words is "forty-seven million, five hundred twenty-nine thousand, nine hundred twenty-one".