978196391147 has 2 divisors, whose sum is σ = 978196391148. Its totient is φ = 978196391146.

The previous prime is 978196391101. The next prime is 978196391167. The reversal of 978196391147 is 741193691879.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978196391147 - 2¹⁰ = 978196390123 is a prime.

It is not a weakly prime, because it can be changed into another prime (978196391167) 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, 489098195573 + 489098195574.

It is an arithmetic number, because the mean of its divisors is an integer number (489098195574).

Almost surely, 2^978196391147 is an apocalyptic number.

978196391147 is a deficient number, since it is larger than the sum of its proper divisors (1).

978196391147 is an equidigital number, since it uses as much as digits as its factorization.

978196391147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 65.

The spelling of 978196391147 in words is "nine hundred seventy-eight billion, one hundred ninety-six million, three hundred ninety-one thousand, one hundred forty-seven".