47450721 has 8 divisors (see below), whose sum is σ = 63299520. Its totient is φ = 31617872.

The previous prime is 47450719. The next prime is 47450729. The reversal of 47450721 is 12705474.

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

It is a cyclic number.

It is not a de Polignac number, because 47450721 - 2¹ = 47450719 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (47450729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9031 + ... + 13283.

It is an arithmetic number, because the mean of its divisors is an integer number (7912440).

Almost surely, 2^47450721 is an apocalyptic number.

It is an amenable number.

47450721 is a deficient number, since it is larger than the sum of its proper divisors (15848799).

47450721 is a wasteful number, since it uses less digits than its factorization.

47450721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 47450721 is about 6888.4483739083. The cubic root of 47450721 is about 362.0325383082.

The spelling of 47450721 in words is "forty-seven million, four hundred fifty thousand, seven hundred twenty-one".