47278849 has 2 divisors, whose sum is σ = 47278850. Its totient is φ = 47278848.

The previous prime is 47278841. The next prime is 47278871. The reversal of 47278849 is 94887274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31438449 + 15840400 = 5607^2 + 3980^2 .

It is a cyclic number.

It is not a de Polignac number, because 47278849 - 2³ = 47278841 is a prime.

It is not a weakly prime, because it can be changed into another prime (47278841) 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, 23639424 + 23639425.

It is an arithmetic number, because the mean of its divisors is an integer number (23639425).

Almost surely, 2^47278849 is an apocalyptic number.

It is an amenable number.

47278849 is a deficient number, since it is larger than the sum of its proper divisors (1).

47278849 is an equidigital number, since it uses as much as digits as its factorization.

47278849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 49.

The square root of 47278849 is about 6875.9616781945. The cubic root of 47278849 is about 361.5949015820.

The spelling of 47278849 in words is "forty-seven million, two hundred seventy-eight thousand, eight hundred forty-nine".