47718391 has 8 divisors (see below), whose sum is σ = 55564704. Its totient is φ = 40129440.

The previous prime is 47718361. The next prime is 47718397. The reversal of 47718391 is 19381774.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47718391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47718397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63940 + ... + 64681.

It is an arithmetic number, because the mean of its divisors is an integer number (6945588).

Almost surely, 2^47718391 is an apocalyptic number.

47718391 is a deficient number, since it is larger than the sum of its proper divisors (7846313).

47718391 is a wasteful number, since it uses less digits than its factorization.

47718391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128681.

The product of its digits is 42336, while the sum is 40.

The square root of 47718391 is about 6907.8499549426. The cubic root of 47718391 is about 362.7120053559.

The spelling of 47718391 in words is "forty-seven million, seven hundred eighteen thousand, three hundred ninety-one".