47783947 has 2 divisors, whose sum is σ = 47783948. Its totient is φ = 47783946.

The previous prime is 47783933. The next prime is 47783969. The reversal of 47783947 is 74938774.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47783947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47783947.

It is not a weakly prime, because it can be changed into another prime (47783147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23891973 + 23891974.

It is an arithmetic number, because the mean of its divisors is an integer number (23891974).

Almost surely, 2^47783947 is an apocalyptic number.

47783947 is a deficient number, since it is larger than the sum of its proper divisors (1).

47783947 is an equidigital number, since it uses as much as digits as its factorization.

47783947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 47783947 is about 6912.5933628415. The cubic root of 47783947 is about 362.8780284708.

The spelling of 47783947 in words is "forty-seven million, seven hundred eighty-three thousand, nine hundred forty-seven".