47721473 has 4 divisors (see below), whose sum is σ = 47766228. Its totient is φ = 47676720.

The previous prime is 47721469. The next prime is 47721491. The reversal of 47721473 is 37412774.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45265984 + 2455489 = 6728^2 + 1567^2 .

It is a cyclic number.

It is not a de Polignac number, because 47721473 - 2² = 47721469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47721413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20738 + ... + 22923.

It is an arithmetic number, because the mean of its divisors is an integer number (11941557).

Almost surely, 2^47721473 is an apocalyptic number.

It is an amenable number.

47721473 is a deficient number, since it is larger than the sum of its proper divisors (44755).

47721473 is a wasteful number, since it uses less digits than its factorization.

47721473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44754.

The product of its digits is 32928, while the sum is 35.

The square root of 47721473 is about 6908.0730308821. The cubic root of 47721473 is about 362.7198140457.

The spelling of 47721473 in words is "forty-seven million, seven hundred twenty-one thousand, four hundred seventy-three".