47918409 has 32 divisors (see below), whose sum is σ = 80047104. Its totient is φ = 24770880.

The previous prime is 47918369. The next prime is 47918417. The reversal of 47918409 is 90481974.

It is not a de Polignac number, because 47918409 - 2¹³ = 47910217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47918459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65007 + ... + 65739.

It is an arithmetic number, because the mean of its divisors is an integer number (2501472).

Almost surely, 2^47918409 is an apocalyptic number.

It is an amenable number.

47918409 is a deficient number, since it is larger than the sum of its proper divisors (32128695).

47918409 is a wasteful number, since it uses less digits than its factorization.

47918409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 47918409 is about 6922.3124026585. The cubic root of 47918409 is about 363.2180841625.

The spelling of 47918409 in words is "forty-seven million, nine hundred eighteen thousand, four hundred nine".