47128117 has 2 divisors, whose sum is σ = 47128118. Its totient is φ = 47128116.

The previous prime is 47128099. The next prime is 47128163. The reversal of 47128117 is 71182174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40373316 + 6754801 = 6354^2 + 2599^2 .

It is a cyclic number.

It is not a de Polignac number, because 47128117 - 2¹¹ = 47126069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47128187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23564058 + 23564059.

It is an arithmetic number, because the mean of its divisors is an integer number (23564059).

Almost surely, 2^47128117 is an apocalyptic number.

It is an amenable number.

47128117 is a deficient number, since it is larger than the sum of its proper divisors (1).

47128117 is an equidigital number, since it uses as much as digits as its factorization.

47128117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 31.

The square root of 47128117 is about 6864.9921340086. The cubic root of 47128117 is about 361.2102197150.

It can be divided in two parts, 47 and 128117, that added together give a square (128164 = 358²).

The spelling of 47128117 in words is "forty-seven million, one hundred twenty-eight thousand, one hundred seventeen".