47840237 has 2 divisors, whose sum is σ = 47840238. Its totient is φ = 47840236.

The previous prime is 47840231. The next prime is 47840239. The reversal of 47840237 is 73204874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47596201 + 244036 = 6899^2 + 494^2 .

It is a cyclic number.

It is not a de Polignac number, because 47840237 - 2¹⁸ = 47578093 is a prime.

Together with 47840239, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47840197 and 47840206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47840231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23920118 + 23920119.

It is an arithmetic number, because the mean of its divisors is an integer number (23920119).

Almost surely, 2^47840237 is an apocalyptic number.

It is an amenable number.

47840237 is a deficient number, since it is larger than the sum of its proper divisors (1).

47840237 is an equidigital number, since it uses as much as digits as its factorization.

47840237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 47840237 is about 6916.6637188749. The cubic root of 47840237 is about 363.0204639532.

The spelling of 47840237 in words is "forty-seven million, eight hundred forty thousand, two hundred thirty-seven".