47791509 has 8 divisors (see below), whose sum is σ = 63870912. Its totient is φ = 31786560.

The previous prime is 47791501. The next prime is 47791519. The reversal of 47791509 is 90519774.

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 47791509 - 2³ = 47791501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47791501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17097 + ... + 19694.

It is an arithmetic number, because the mean of its divisors is an integer number (7983864).

Almost surely, 2^47791509 is an apocalyptic number.

It is an amenable number.

47791509 is a deficient number, since it is larger than the sum of its proper divisors (16079403).

47791509 is a wasteful number, since it uses less digits than its factorization.

47791509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37227.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 47791509 is about 6913.1403139239. The cubic root of 47791509 is about 362.8971697590.

The spelling of 47791509 in words is "forty-seven million, seven hundred ninety-one thousand, five hundred nine".