47442239 has 4 divisors (see below), whose sum is σ = 51091656. Its totient is φ = 43792824.

The previous prime is 47442233. The next prime is 47442253. The reversal of 47442239 is 93224474.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47442239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47442199 and 47442208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47442233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1824689 + ... + 1824714.

It is an arithmetic number, because the mean of its divisors is an integer number (12772914).

Almost surely, 2^47442239 is an apocalyptic number.

47442239 is a deficient number, since it is larger than the sum of its proper divisors (3649417).

47442239 is a wasteful number, since it uses less digits than its factorization.

47442239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649416.

The product of its digits is 48384, while the sum is 35.

The square root of 47442239 is about 6887.8326779910. The cubic root of 47442239 is about 362.0109654503.

The spelling of 47442239 in words is "forty-seven million, four hundred forty-two thousand, two hundred thirty-nine".