47809889 has 4 divisors (see below), whose sum is σ = 47918256. Its totient is φ = 47701524.

The previous prime is 47809877. The next prime is 47809897. The reversal of 47809889 is 98890874.

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 47809889 - 2⁴ = 47809873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47809889.

It is not an unprimeable number, because it can be changed into a prime (47809789) 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, 53519 + ... + 54404.

It is an arithmetic number, because the mean of its divisors is an integer number (11979564).

Almost surely, 2^47809889 is an apocalyptic number.

It is an amenable number.

47809889 is a deficient number, since it is larger than the sum of its proper divisors (108367).

47809889 is a wasteful number, since it uses less digits than its factorization.

47809889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108366.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 47809889 is about 6914.4695385836. The cubic root of 47809889 is about 362.9436856586.

The spelling of 47809889 in words is "forty-seven million, eight hundred nine thousand, eight hundred eighty-nine".