47418909 has 4 divisors (see below), whose sum is σ = 63225216. Its totient is φ = 31612604.

The previous prime is 47418863. The next prime is 47418929. The reversal of 47418909 is 90981474.

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 47418909 - 2⁸ = 47418653 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47418929) 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, 7903149 + ... + 7903154.

It is an arithmetic number, because the mean of its divisors is an integer number (15806304).

Almost surely, 2^47418909 is an apocalyptic number.

It is an amenable number.

47418909 is a deficient number, since it is larger than the sum of its proper divisors (15806307).

47418909 is a wasteful number, since it uses less digits than its factorization.

47418909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15806306.

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

The square root of 47418909 is about 6886.1389036237. The cubic root of 47418909 is about 361.9516153804.

The spelling of 47418909 in words is "forty-seven million, four hundred eighteen thousand, nine hundred nine".