47831291 has 2 divisors, whose sum is σ = 47831292. Its totient is φ = 47831290.

The previous prime is 47831263. The next prime is 47831293. The reversal of 47831291 is 19213874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47831291 - 2²² = 43636987 is a prime.

It is a Sophie Germain prime.

Together with 47831293, 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 (47831293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23915645 + 23915646.

It is an arithmetic number, because the mean of its divisors is an integer number (23915646).

Almost surely, 2^47831291 is an apocalyptic number.

47831291 is a deficient number, since it is larger than the sum of its proper divisors (1).

47831291 is an equidigital number, since it uses as much as digits as its factorization.

47831291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 47831291 is about 6916.0169895685. The cubic root of 47831291 is about 362.9978345815.

The spelling of 47831291 in words is "forty-seven million, eight hundred thirty-one thousand, two hundred ninety-one".