47744921 has 8 divisors (see below), whose sum is σ = 55834944. Its totient is φ = 39972240.

The previous prime is 47744881. The next prime is 47744953. The reversal of 47744921 is 12944774.

47744921 = T₄₀₆ + T₄₀₇ + ... + T₇₀₆.

47744921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-47744921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47740921) 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, 79010 + ... + 79611.

It is an arithmetic number, because the mean of its divisors is an integer number (6979368).

Almost surely, 2^47744921 is an apocalyptic number.

It is an amenable number.

47744921 is a deficient number, since it is larger than the sum of its proper divisors (8090023).

47744921 is a wasteful number, since it uses less digits than its factorization.

47744921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158671.

The product of its digits is 56448, while the sum is 38.

The square root of 47744921 is about 6909.7699672276. The cubic root of 47744921 is about 362.7792119160.

The spelling of 47744921 in words is "forty-seven million, seven hundred forty-four thousand, nine hundred twenty-one".