47721343 has 4 divisors (see below), whose sum is σ = 49796208. Its totient is φ = 45646480.

The previous prime is 47721287. The next prime is 47721367. The reversal of 47721343 is 34312774.

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

It is a cyclic number.

It is not a de Polignac number, because 47721343 - 2¹⁷ = 47590271 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47721043) 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, 1037398 + ... + 1037443.

It is an arithmetic number, because the mean of its divisors is an integer number (12449052).

Almost surely, 2^47721343 is an apocalyptic number.

47721343 is a deficient number, since it is larger than the sum of its proper divisors (2074865).

47721343 is a wasteful number, since it uses less digits than its factorization.

47721343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074864.

The product of its digits is 14112, while the sum is 31.

The square root of 47721343 is about 6908.0636215947. The cubic root of 47721343 is about 362.7194846788.

The spelling of 47721343 in words is "forty-seven million, seven hundred twenty-one thousand, three hundred forty-three".