47951791 has 2 divisors, whose sum is σ = 47951792. Its totient is φ = 47951790.

The previous prime is 47951789. The next prime is 47951809. The reversal of 47951791 is 19715974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47951791 - 2¹ = 47951789 is a prime.

Together with 47951789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47951191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23975895 + 23975896.

It is an arithmetic number, because the mean of its divisors is an integer number (23975896).

Almost surely, 2^47951791 is an apocalyptic number.

47951791 is a deficient number, since it is larger than the sum of its proper divisors (1).

47951791 is an equidigital number, since it uses as much as digits as its factorization.

47951791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 47951791 is about 6924.7231713622. The cubic root of 47951791 is about 363.3024089682.

The spelling of 47951791 in words is "forty-seven million, nine hundred fifty-one thousand, seven hundred ninety-one".