47228891 has 2 divisors, whose sum is σ = 47228892. Its totient is φ = 47228890.

The previous prime is 47228861. The next prime is 47228893. The reversal of 47228891 is 19882274.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47228891 - 2¹⁰ = 47227867 is a prime.

Together with 47228893, 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 (47228893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23614445 + 23614446.

It is an arithmetic number, because the mean of its divisors is an integer number (23614446).

Almost surely, 2^47228891 is an apocalyptic number.

47228891 is a deficient number, since it is larger than the sum of its proper divisors (1).

47228891 is an equidigital number, since it uses as much as digits as its factorization.

47228891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 47228891 is about 6872.3279170889. The cubic root of 47228891 is about 361.4674948949.

The spelling of 47228891 in words is "forty-seven million, two hundred twenty-eight thousand, eight hundred ninety-one".