1982878847 has 2 divisors, whose sum is σ = 1982878848. Its totient is φ = 1982878846.

The previous prime is 1982878831. The next prime is 1982878873. The reversal of 1982878847 is 7488782891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1982878847 - 2⁴ = 1982878831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1982878847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1982878897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991439423 + 991439424.

It is an arithmetic number, because the mean of its divisors is an integer number (991439424).

Almost surely, 2^1982878847 is an apocalyptic number.

1982878847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982878847 is an equidigital number, since it uses as much as digits as its factorization.

1982878847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14450688, while the sum is 62.

The square root of 1982878847 is about 44529.5278102070. The cubic root of 1982878847 is about 1256.3155249371.

The spelling of 1982878847 in words is "one billion, nine hundred eighty-two million, eight hundred seventy-eight thousand, eight hundred forty-seven".