47821849 has 2 divisors, whose sum is σ = 47821850. Its totient is φ = 47821848.

The previous prime is 47821817. The next prime is 47821859. The reversal of 47821849 is 94812874.

47821849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47817225 + 4624 = 6915^2 + 68^2 .

It is a cyclic number.

It is not a de Polignac number, because 47821849 - 2⁵ = 47821817 is a prime.

It is not a weakly prime, because it can be changed into another prime (47821859) 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 as a sum of consecutive naturals, namely, 23910924 + 23910925.

It is an arithmetic number, because the mean of its divisors is an integer number (23910925).

Almost surely, 2^47821849 is an apocalyptic number.

It is an amenable number.

47821849 is a deficient number, since it is larger than the sum of its proper divisors (1).

47821849 is an equidigital number, since it uses as much as digits as its factorization.

47821849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 47821849 is about 6915.3343375429. The cubic root of 47821849 is about 362.9739474911.

Subtracting 47821849 from its reverse (94812874), we obtain a square (46991025 = 6855²).

The spelling of 47821849 in words is "forty-seven million, eight hundred twenty-one thousand, eight hundred forty-nine".