9778248679 has 2 divisors, whose sum is σ = 9778248680. Its totient is φ = 9778248678.

The previous prime is 9778248619. The next prime is 9778248691. The reversal of 9778248679 is 9768428779.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9778248679 - 2⁷ = 9778248551 is a prime.

It is a super-2 number, since 2×9778248679² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9778248619) 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, 4889124339 + 4889124340.

It is an arithmetic number, because the mean of its divisors is an integer number (4889124340).

Almost surely, 2^9778248679 is an apocalyptic number.

9778248679 is a deficient number, since it is larger than the sum of its proper divisors (1).

9778248679 is an equidigital number, since it uses as much as digits as its factorization.

9778248679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85349376, while the sum is 67.

The square root of 9778248679 is about 98885.0275774852. The cubic root of 9778248679 is about 2138.3905474424.

The spelling of 9778248679 in words is "nine billion, seven hundred seventy-eight million, two hundred forty-eight thousand, six hundred seventy-nine".