47638447 has 4 divisors (see below), whose sum is σ = 47848536. Its totient is φ = 47428360.

The previous prime is 47638421. The next prime is 47638457. The reversal of 47638447 is 74483674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74483674 = 2 ⋅37241837.

It is a cyclic number.

It is not a de Polignac number, because 47638447 - 2⁷ = 47638319 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 (47638417) 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, 104704 + ... + 105157.

It is an arithmetic number, because the mean of its divisors is an integer number (11962134).

Almost surely, 2^47638447 is an apocalyptic number.

47638447 is a deficient number, since it is larger than the sum of its proper divisors (210089).

47638447 is a wasteful number, since it uses less digits than its factorization.

47638447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210088.

The product of its digits is 451584, while the sum is 43.

The square root of 47638447 is about 6902.0610689851. The cubic root of 47638447 is about 362.5093381661.

The spelling of 47638447 in words is "forty-seven million, six hundred thirty-eight thousand, four hundred forty-seven".