978422197 has 2 divisors, whose sum is σ = 978422198. Its totient is φ = 978422196.

The previous prime is 978422183. The next prime is 978422209. The reversal of 978422197 is 791224879.

978422197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 951475716 + 26946481 = 30846^2 + 5191^2 .

It is a cyclic number.

It is not a de Polignac number, because 978422197 - 2⁷ = 978422069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 978422197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978428197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489211098 + 489211099.

It is an arithmetic number, because the mean of its divisors is an integer number (489211099).

Almost surely, 2^978422197 is an apocalyptic number.

It is an amenable number.

978422197 is a deficient number, since it is larger than the sum of its proper divisors (1).

978422197 is an equidigital number, since it uses as much as digits as its factorization.

978422197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 978422197 is about 31279.7409995671. The cubic root of 978422197 is about 992.7550362619.

The spelling of 978422197 in words is "nine hundred seventy-eight million, four hundred twenty-two thousand, one hundred ninety-seven".