47330909 has 2 divisors, whose sum is σ = 47330910. Its totient is φ = 47330908.

The previous prime is 47330903. The next prime is 47330911. The reversal of 47330909 is 90903374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47306884 + 24025 = 6878^2 + 155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47330909 is a prime.

Together with 47330911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47330903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23665454 + 23665455.

It is an arithmetic number, because the mean of its divisors is an integer number (23665455).

Almost surely, 2^47330909 is an apocalyptic number.

It is an amenable number.

47330909 is a deficient number, since it is larger than the sum of its proper divisors (1).

47330909 is an equidigital number, since it uses as much as digits as its factorization.

47330909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 47330909 is about 6879.7462889266. The cubic root of 47330909 is about 361.7275734904.

The spelling of 47330909 in words is "forty-seven million, three hundred thirty thousand, nine hundred nine".