47784287 has 2 divisors, whose sum is σ = 47784288. Its totient is φ = 47784286.

The previous prime is 47784283. The next prime is 47784293. The reversal of 47784287 is 78248774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47784287 - 2² = 47784283 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47784283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23892143 + 23892144.

It is an arithmetic number, because the mean of its divisors is an integer number (23892144).

Almost surely, 2^47784287 is an apocalyptic number.

47784287 is a deficient number, since it is larger than the sum of its proper divisors (1).

47784287 is an equidigital number, since it uses as much as digits as its factorization.

47784287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 702464, while the sum is 47.

The square root of 47784287 is about 6912.6179555940. The cubic root of 47784287 is about 362.8788891381.

The spelling of 47784287 in words is "forty-seven million, seven hundred eighty-four thousand, two hundred eighty-seven".