47381393 has 4 divisors (see below), whose sum is σ = 47412660. Its totient is φ = 47350128.

The previous prime is 47381371. The next prime is 47381401. The reversal of 47381393 is 39318374.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4190209 + 43191184 = 2047^2 + 6572^2 .

It is a cyclic number.

It is not a de Polignac number, because 47381393 - 2⁸ = 47381137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47381093) 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, 13238 + ... + 16431.

It is an arithmetic number, because the mean of its divisors is an integer number (11853165).

Almost surely, 2^47381393 is an apocalyptic number.

It is an amenable number.

47381393 is a deficient number, since it is larger than the sum of its proper divisors (31267).

47381393 is a wasteful number, since it uses less digits than its factorization.

47381393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31266.

The product of its digits is 54432, while the sum is 38.

The square root of 47381393 is about 6883.4143417348. The cubic root of 47381393 is about 361.8561361737.

It can be divided in two parts, 47381 and 393, that added together give a palindrome (47774).

The spelling of 47381393 in words is "forty-seven million, three hundred eighty-one thousand, three hundred ninety-three".