47497809 has 8 divisors (see below), whose sum is σ = 63369952. Its totient is φ = 31645440.

The previous prime is 47497789. The next prime is 47497819. The reversal of 47497809 is 90879474.

It is a happy number.

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

It is not a de Polignac number, because 47497809 - 2²¹ = 45400657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47497819) 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, 2097 + ... + 9969.

It is an arithmetic number, because the mean of its divisors is an integer number (7921244).

Almost surely, 2^47497809 is an apocalyptic number.

It is an amenable number.

47497809 is a deficient number, since it is larger than the sum of its proper divisors (15872143).

47497809 is a wasteful number, since it uses less digits than its factorization.

47497809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9887.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 47497809 is about 6891.8654223657. The cubic root of 47497809 is about 362.1522537511.

The spelling of 47497809 in words is "forty-seven million, four hundred ninety-seven thousand, eight hundred nine".