9778078493 has 2 divisors, whose sum is σ = 9778078494. Its totient is φ = 9778078492.

The previous prime is 9778078483. The next prime is 9778078511. The reversal of 9778078493 is 3948708779.

9778078493 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6726952324 + 3051126169 = 82018^2 + 55237^2 .

It is a cyclic number.

It is not a de Polignac number, because 9778078493 - 2¹⁴ = 9778062109 is a prime.

It is a super-3 number, since 3×9778078493³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9778078483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4889039246 + 4889039247.

It is an arithmetic number, because the mean of its divisors is an integer number (4889039247).

Almost surely, 2^9778078493 is an apocalyptic number.

It is an amenable number.

9778078493 is a deficient number, since it is larger than the sum of its proper divisors (1).

9778078493 is an equidigital number, since it uses as much as digits as its factorization.

9778078493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21337344, while the sum is 62.

The square root of 9778078493 is about 98884.1670491287. The cubic root of 9778078493 is about 2138.3781414634.

The spelling of 9778078493 in words is "nine billion, seven hundred seventy-eight million, seventy-eight thousand, four hundred ninety-three".