1878947047 has 2 divisors, whose sum is σ = 1878947048. Its totient is φ = 1878947046.

The previous prime is 1878947023. The next prime is 1878947089. The reversal of 1878947047 is 7407498781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1878947047 - 2¹⁹ = 1878422759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1878942047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 939473523 + 939473524.

It is an arithmetic number, because the mean of its divisors is an integer number (939473524).

Almost surely, 2^1878947047 is an apocalyptic number.

1878947047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1878947047 is an equidigital number, since it uses as much as digits as its factorization.

1878947047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The square root of 1878947047 is about 43346.8228016772. The cubic root of 1878947047 is about 1233.9706978271.

The spelling of 1878947047 in words is "one billion, eight hundred seventy-eight million, nine hundred forty-seven thousand, forty-seven".