47975809 has 8 divisors (see below), whose sum is σ = 54952128. Its totient is φ = 41030160.

The previous prime is 47975803. The next prime is 47975813. The reversal of 47975809 is 90857974.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47975809 - 2³ = 47975801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47975801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4207 + ... + 10660.

It is an arithmetic number, because the mean of its divisors is an integer number (6869016).

Almost surely, 2^47975809 is an apocalyptic number.

It is an amenable number.

47975809 is a deficient number, since it is larger than the sum of its proper divisors (6976319).

47975809 is a wasteful number, since it uses less digits than its factorization.

47975809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15335.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 47975809 is about 6926.4571752087. The cubic root of 47975809 is about 363.3630555790.

It can be divided in two parts, 47975 and 809, that added together give a palindrome (48784).

The spelling of 47975809 in words is "forty-seven million, nine hundred seventy-five thousand, eight hundred nine".