47381623 has 4 divisors (see below), whose sum is σ = 47487600. Its totient is φ = 47275648.

The previous prime is 47381603. The next prime is 47381639. The reversal of 47381623 is 32618374.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32618374 = 2 ⋅16309187.

It is a cyclic number.

It is not a de Polignac number, because 47381623 - 2¹⁷ = 47250551 is a prime.

It is a super-2 number, since 2×47381623² = 4490036396228258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47381603) 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 3 ways as a sum of consecutive naturals, for example, 52315 + ... + 53212.

It is an arithmetic number, because the mean of its divisors is an integer number (11871900).

Almost surely, 2^47381623 is an apocalyptic number.

47381623 is a deficient number, since it is larger than the sum of its proper divisors (105977).

47381623 is a wasteful number, since it uses less digits than its factorization.

47381623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105976.

The product of its digits is 24192, while the sum is 34.

The square root of 47381623 is about 6883.4310485397. The cubic root of 47381623 is about 361.8567216833.

Adding to 47381623 its reverse (32618374), we get a palindrome (79999997).

The spelling of 47381623 in words is "forty-seven million, three hundred eighty-one thousand, six hundred twenty-three".