47320387 has 4 divisors (see below), whose sum is σ = 47385160. Its totient is φ = 47255616.

The previous prime is 47320381. The next prime is 47320411. The reversal of 47320387 is 78302374.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47320387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47320381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31278 + ... + 32755.

It is an arithmetic number, because the mean of its divisors is an integer number (11846290).

Almost surely, 2^47320387 is an apocalyptic number.

47320387 is a deficient number, since it is larger than the sum of its proper divisors (64773).

47320387 is an equidigital number, since it uses as much as digits as its factorization.

47320387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64772.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 47320387 is about 6878.9815379895. The cubic root of 47320387 is about 361.7007666272.

The spelling of 47320387 in words is "forty-seven million, three hundred twenty thousand, three hundred eighty-seven".