47781047 has 2 divisors, whose sum is σ = 47781048. Its totient is φ = 47781046.

The previous prime is 47781011. The next prime is 47781049. The reversal of 47781047 is 74018774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47781047 - 2¹² = 47776951 is a prime.

Together with 47781049, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47781047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47781049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23890523 + 23890524.

It is an arithmetic number, because the mean of its divisors is an integer number (23890524).

Almost surely, 2^47781047 is an apocalyptic number.

47781047 is a deficient number, since it is larger than the sum of its proper divisors (1).

47781047 is an equidigital number, since it uses as much as digits as its factorization.

47781047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 47781047 is about 6912.3835975733. The cubic root of 47781047 is about 362.8706873194.

The spelling of 47781047 in words is "forty-seven million, seven hundred eighty-one thousand, forty-seven".