9428778097 has 2 divisors, whose sum is σ = 9428778098. Its totient is φ = 9428778096.

The previous prime is 9428778067. The next prime is 9428778109. The reversal of 9428778097 is 7908778249.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9313022016 + 115756081 = 96504^2 + 10759^2 .

It is a cyclic number.

It is not a de Polignac number, because 9428778097 - 2²⁷ = 9294560369 is a prime.

It is not a weakly prime, because it can be changed into another prime (9428778067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4714389048 + 4714389049.

It is an arithmetic number, because the mean of its divisors is an integer number (4714389049).

Almost surely, 2^9428778097 is an apocalyptic number.

It is an amenable number.

9428778097 is a deficient number, since it is larger than the sum of its proper divisors (1).

9428778097 is an equidigital number, since it uses as much as digits as its factorization.

9428778097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14224896, while the sum is 61.

The square root of 9428778097 is about 97101.8954346412. The cubic root of 9428778097 is about 2112.6058187344.

The spelling of 9428778097 in words is "nine billion, four hundred twenty-eight million, seven hundred seventy-eight thousand, ninety-seven".