47971591 has 2 divisors, whose sum is σ = 47971592. Its totient is φ = 47971590.

The previous prime is 47971571. The next prime is 47971619. The reversal of 47971591 is 19517974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47971591 - 2¹¹ = 47969543 is a prime.

It is equal to p_2886568 and since 47971591 and 2886568 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47971571) 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, 23985795 + 23985796.

It is an arithmetic number, because the mean of its divisors is an integer number (23985796).

Almost surely, 2^47971591 is an apocalyptic number.

47971591 is a deficient number, since it is larger than the sum of its proper divisors (1).

47971591 is an equidigital number, since it uses as much as digits as its factorization.

47971591 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 47971591 is about 6926.1526838498. The cubic root of 47971591 is about 363.3524063906.

The spelling of 47971591 in words is "forty-seven million, nine hundred seventy-one thousand, five hundred ninety-one".