47911109 has 2 divisors, whose sum is σ = 47911110. Its totient is φ = 47911108.

The previous prime is 47911057. The next prime is 47911121. The reversal of 47911109 is 90111974.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43850884 + 4060225 = 6622^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 47911109 - 2⁸ = 47910853 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47911309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23955554 + 23955555.

It is an arithmetic number, because the mean of its divisors is an integer number (23955555).

Almost surely, 2^47911109 is an apocalyptic number.

It is an amenable number.

47911109 is a deficient number, since it is larger than the sum of its proper divisors (1).

47911109 is an equidigital number, since it uses as much as digits as its factorization.

47911109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 47911109 is about 6921.7851021250. The cubic root of 47911109 is about 363.1996387346.

The spelling of 47911109 in words is "forty-seven million, nine hundred eleven thousand, one hundred nine".