978049847 has 2 divisors, whose sum is σ = 978049848. Its totient is φ = 978049846.

The previous prime is 978049829. The next prime is 978049873. The reversal of 978049847 is 748940879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978049847 - 2¹⁰ = 978048823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978049792 and 978049801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978049817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489024923 + 489024924.

It is an arithmetic number, because the mean of its divisors is an integer number (489024924).

Almost surely, 2^978049847 is an apocalyptic number.

978049847 is a deficient number, since it is larger than the sum of its proper divisors (1).

978049847 is an equidigital number, since it uses as much as digits as its factorization.

978049847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The square root of 978049847 is about 31273.7884977180. The cubic root of 978049847 is about 992.6290854401.

The spelling of 978049847 in words is "nine hundred seventy-eight million, forty-nine thousand, eight hundred forty-seven".