978112897 has 2 divisors, whose sum is σ = 978112898. Its totient is φ = 978112896.

The previous prime is 978112879. The next prime is 978112907. The reversal of 978112897 is 798211879.

Together with previous prime (978112879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552062016 + 426050881 = 23496^2 + 20641^2 .

It is an emirp because it is prime and its reverse (798211879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 978112897 - 2¹⁹ = 977588609 is a prime.

It is not a weakly prime, because it can be changed into another prime (978112397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489056448 + 489056449.

It is an arithmetic number, because the mean of its divisors is an integer number (489056449).

Almost surely, 2^978112897 is an apocalyptic number.

It is an amenable number.

978112897 is a deficient number, since it is larger than the sum of its proper divisors (1).

978112897 is an equidigital number, since it uses as much as digits as its factorization.

978112897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 52.

The square root of 978112897 is about 31274.7965141262. The cubic root of 978112897 is about 992.6504149320.

The spelling of 978112897 in words is "nine hundred seventy-eight million, one hundred twelve thousand, eight hundred ninety-seven".