47219911 has 2 divisors, whose sum is σ = 47219912. Its totient is φ = 47219910.

The previous prime is 47219903. The next prime is 47219933. The reversal of 47219911 is 11991274.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47219911 - 2³ = 47219903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47219941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23609955 + 23609956.

It is an arithmetic number, because the mean of its divisors is an integer number (23609956).

Almost surely, 2^47219911 is an apocalyptic number.

47219911 is a deficient number, since it is larger than the sum of its proper divisors (1).

47219911 is an equidigital number, since it uses as much as digits as its factorization.

47219911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 47219911 is about 6871.6745411872. The cubic root of 47219911 is about 361.4445838914. Note that the first 3 decimals are identical.

The spelling of 47219911 in words is "forty-seven million, two hundred nineteen thousand, nine hundred eleven".