47887121 has 2 divisors, whose sum is σ = 47887122. Its totient is φ = 47887120.

The previous prime is 47887097. The next prime is 47887123. The reversal of 47887121 is 12178874.

47887121 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., 44408896 + 3478225 = 6664^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 47887121 - 2¹⁴ = 47870737 is a prime.

Together with 47887123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47887123) 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, 23943560 + 23943561.

It is an arithmetic number, because the mean of its divisors is an integer number (23943561).

Almost surely, 2^47887121 is an apocalyptic number.

It is an amenable number.

47887121 is a deficient number, since it is larger than the sum of its proper divisors (1).

47887121 is an equidigital number, since it uses as much as digits as its factorization.

47887121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 38.

The square root of 47887121 is about 6920.0520951796. The cubic root of 47887121 is about 363.1390133560.

The spelling of 47887121 in words is "forty-seven million, eight hundred eighty-seven thousand, one hundred twenty-one".