47128747 has 2 divisors, whose sum is σ = 47128748. Its totient is φ = 47128746.

The previous prime is 47128717. The next prime is 47128751. The reversal of 47128747 is 74782174.

47128747 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 is a cyclic number.

It is not a de Polignac number, because 47128747 - 2²³ = 38740139 is a prime.

It is a super-2 number, since 2×47128747² = 4442237587580018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47128717) 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, 23564373 + 23564374.

It is an arithmetic number, because the mean of its divisors is an integer number (23564374).

Almost surely, 2^47128747 is an apocalyptic number.

47128747 is a deficient number, since it is larger than the sum of its proper divisors (1).

47128747 is an equidigital number, since it uses as much as digits as its factorization.

47128747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 40.

The square root of 47128747 is about 6865.0380188314. The cubic root of 47128747 is about 361.2118292384.

The spelling of 47128747 in words is "forty-seven million, one hundred twenty-eight thousand, seven hundred forty-seven".