47383181 has 2 divisors, whose sum is σ = 47383182. Its totient is φ = 47383180.

The previous prime is 47383157. The next prime is 47383183. The reversal of 47383181 is 18138374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41088100 + 6295081 = 6410^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 47383181 - 2⁶ = 47383117 is a prime.

It is a super-2 number, since 2×47383181² = 4490331683357522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 47383183, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47383183) 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 as a sum of consecutive naturals, namely, 23691590 + 23691591.

It is an arithmetic number, because the mean of its divisors is an integer number (23691591).

Almost surely, 2^47383181 is an apocalyptic number.

It is an amenable number.

47383181 is a deficient number, since it is larger than the sum of its proper divisors (1).

47383181 is an equidigital number, since it uses as much as digits as its factorization.

47383181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 47383181 is about 6883.5442179157. The cubic root of 47383181 is about 361.8606878243.

The spelling of 47383181 in words is "forty-seven million, three hundred eighty-three thousand, one hundred eighty-one".