47923381 has 6 divisors (see below), whose sum is σ = 52676246. Its totient is φ = 43566600.

The previous prime is 47923363. The next prime is 47923397. The reversal of 47923381 is 18332974.

47923381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 42120100 + 5803281 = 6490^2 + 2409^2 .

It is not a de Polignac number, because 47923381 - 2¹⁵ = 47890613 is a prime.

It is a super-2 number, since 2×47923381² = 4593300892942322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47923381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47923331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197910 + ... + 198151.

Almost surely, 2^47923381 is an apocalyptic number.

It is an amenable number.

47923381 is a deficient number, since it is larger than the sum of its proper divisors (4752865).

47923381 is a wasteful number, since it uses less digits than its factorization.

47923381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396083 (or 396072 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 47923381 is about 6922.6715218910. The cubic root of 47923381 is about 363.2306461952.

The spelling of 47923381 in words is "forty-seven million, nine hundred twenty-three thousand, three hundred eighty-one".