47688191 has 2 divisors, whose sum is σ = 47688192. Its totient is φ = 47688190.

The previous prime is 47688139. The next prime is 47688197. The reversal of 47688191 is 19188674.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47688191 - 2²² = 43493887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47688197) 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, 23844095 + 23844096.

It is an arithmetic number, because the mean of its divisors is an integer number (23844096).

Almost surely, 2^47688191 is an apocalyptic number.

47688191 is a deficient number, since it is larger than the sum of its proper divisors (1).

47688191 is an equidigital number, since it uses as much as digits as its factorization.

47688191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 47688191 is about 6905.6636900446. The cubic root of 47688191 is about 362.6354715222.

The spelling of 47688191 in words is "forty-seven million, six hundred eighty-eight thousand, one hundred ninety-one".