47118387 has 4 divisors (see below), whose sum is σ = 62824520. Its totient is φ = 31412256.

The previous prime is 47118377. The next prime is 47118437. The reversal of 47118387 is 78381174.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 47118387 - 2⁷ = 47118259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47118377) 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, 7853062 + ... + 7853067.

It is an arithmetic number, because the mean of its divisors is an integer number (15706130).

Almost surely, 2^47118387 is an apocalyptic number.

47118387 is a deficient number, since it is larger than the sum of its proper divisors (15706133).

47118387 is a wasteful number, since it uses less digits than its factorization.

47118387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15706132.

The product of its digits is 37632, while the sum is 39.

The square root of 47118387 is about 6864.2834294630. The cubic root of 47118387 is about 361.1853596982.

The spelling of 47118387 in words is "forty-seven million, one hundred eighteen thousand, three hundred eighty-seven".