47387813 has 8 divisors (see below), whose sum is σ = 51797856. Its totient is φ = 42994800.

The previous prime is 47387807. The next prime is 47387831. The reversal of 47387813 is 31878374.

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

It is a cyclic number.

It is not a de Polignac number, because 47387813 - 2⁶ = 47387749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47387833) 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, 1970 + ... + 9932.

It is an arithmetic number, because the mean of its divisors is an integer number (6474732).

Almost surely, 2^47387813 is an apocalyptic number.

It is an amenable number.

47387813 is a deficient number, since it is larger than the sum of its proper divisors (4410043).

47387813 is a wasteful number, since it uses less digits than its factorization.

47387813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515.

The product of its digits is 112896, while the sum is 41.

The square root of 47387813 is about 6883.8806642765. The cubic root of 47387813 is about 361.8724788161.

The spelling of 47387813 in words is "forty-seven million, three hundred eighty-seven thousand, eight hundred thirteen".