47216891 has 2 divisors, whose sum is σ = 47216892. Its totient is φ = 47216890.

The previous prime is 47216887. The next prime is 47216893. The reversal of 47216891 is 19861274.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47216891 - 2² = 47216887 is a prime.

Together with 47216893, 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 (47216893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23608445 + 23608446.

It is an arithmetic number, because the mean of its divisors is an integer number (23608446).

Almost surely, 2^47216891 is an apocalyptic number.

47216891 is a deficient number, since it is larger than the sum of its proper divisors (1).

47216891 is an equidigital number, since it uses as much as digits as its factorization.

47216891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 47216891 is about 6871.4547950198. The cubic root of 47216891 is about 361.4368782019.

The spelling of 47216891 in words is "forty-seven million, two hundred sixteen thousand, eight hundred ninety-one".