47729823 has 8 divisors (see below), whose sum is σ = 64030848. Its totient is φ = 31624344.

The previous prime is 47729819. The next prime is 47729861. The reversal of 47729823 is 32892774.

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

It is not a de Polignac number, because 47729823 - 2² = 47729819 is a prime.

It is a super-2 number, since 2×47729823² = 4556272007222658, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47729893) 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, 48315 + ... + 49292.

It is an arithmetic number, because the mean of its divisors is an integer number (8003856).

Almost surely, 2^47729823 is an apocalyptic number.

47729823 is a deficient number, since it is larger than the sum of its proper divisors (16301025).

47729823 is a wasteful number, since it uses less digits than its factorization.

47729823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97773.

The product of its digits is 169344, while the sum is 42.

The square root of 47729823 is about 6908.6773698010. The cubic root of 47729823 is about 362.7409682811.

The spelling of 47729823 in words is "forty-seven million, seven hundred twenty-nine thousand, eight hundred twenty-three".