47693909 has 2 divisors, whose sum is σ = 47693910. Its totient is φ = 47693908.

The previous prime is 47693879. The next prime is 47693929. The reversal of 47693909 is 90939674.

47693909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47679025 + 14884 = 6905^2 + 122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47693909 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 (47693929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23846954 + 23846955.

It is an arithmetic number, because the mean of its divisors is an integer number (23846955).

Almost surely, 2^47693909 is an apocalyptic number.

It is an amenable number.

47693909 is a deficient number, since it is larger than the sum of its proper divisors (1).

47693909 is an equidigital number, since it uses as much as digits as its factorization.

47693909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 47693909 is about 6906.0776856331. The cubic root of 47693909 is about 362.6499647452.

The spelling of 47693909 in words is "forty-seven million, six hundred ninety-three thousand, nine hundred nine".