47442643 has 4 divisors (see below), whose sum is σ = 47761200. Its totient is φ = 47124088.

The previous prime is 47442613. The next prime is 47442649. The reversal of 47442643 is 34624474.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34624474 = 2 ⋅17312237.

It is a cyclic number.

It is not a de Polignac number, because 47442643 - 2¹⁷ = 47311571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47442599 and 47442608.

It is not an unprimeable number, because it can be changed into a prime (47442649) 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, 159055 + ... + 159352.

It is an arithmetic number, because the mean of its divisors is an integer number (11940300).

Almost surely, 2^47442643 is an apocalyptic number.

47442643 is a deficient number, since it is larger than the sum of its proper divisors (318557).

47442643 is a wasteful number, since it uses less digits than its factorization.

47442643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318556.

The product of its digits is 64512, while the sum is 34.

The square root of 47442643 is about 6887.8620050056. The cubic root of 47442643 is about 362.0119930298.

The spelling of 47442643 in words is "forty-seven million, four hundred forty-two thousand, six hundred forty-three".