47939538889 has 4 divisors (see below), whose sum is σ = 52297678800. Its totient is φ = 43581398980.

The previous prime is 47939538839. The next prime is 47939538893. The reversal of 47939538889 is 98883593974.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47939538889 - 2⁹ = 47939538377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47939538839) 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, 2179069939 + ... + 2179069960.

It is an arithmetic number, because the mean of its divisors is an integer number (13074419700).

Almost surely, 2^47939538889 is an apocalyptic number.

It is an amenable number.

47939538889 is a deficient number, since it is larger than the sum of its proper divisors (4358139911).

47939538889 is a wasteful number, since it uses less digits than its factorization.

47939538889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358139910.

The product of its digits is 470292480, while the sum is 73.

The spelling of 47939538889 in words is "forty-seven billion, nine hundred thirty-nine million, five hundred thirty-eight thousand, eight hundred eighty-nine".