47721423 has 4 divisors (see below), whose sum is σ = 63628568. Its totient is φ = 31814280.

The previous prime is 47721413. The next prime is 47721433. The reversal of 47721423 is 32412774.

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

It is an interprime number because it is at equal distance from previous prime (47721413) and next prime (47721433).

It is not a de Polignac number, because 47721423 - 2¹⁴ = 47705039 is a prime.

It is a Duffinian number.

It is a congruent 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, 7953568 + ... + 7953573.

It is an arithmetic number, because the mean of its divisors is an integer number (15907142).

Almost surely, 2^47721423 is an apocalyptic number.

47721423 is a deficient number, since it is larger than the sum of its proper divisors (15907145).

47721423 is a wasteful number, since it uses less digits than its factorization.

47721423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15907144.

The product of its digits is 9408, while the sum is 30.

The square root of 47721423 is about 6908.0694119269. The cubic root of 47721423 is about 362.7196873662.

The spelling of 47721423 in words is "forty-seven million, seven hundred twenty-one thousand, four hundred twenty-three".