9229784978 has 6 divisors (see below), whose sum is σ = 13844881269. Its totient is φ = 4614824556.

The previous prime is 9229784951. The next prime is 9229784999. The reversal of 9229784978 is 8794879229.

It can be written as a sum of positive squares in 2 ways, for example, as 7104298369 + 2125486609 = 84287^2 + 46103^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=67933.

It is a super-2 number, since 2×9229784978² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 101900 + ... + 169832.

Almost surely, 2^9229784978 is an apocalyptic number.

9229784978 is a deficient number, since it is larger than the sum of its proper divisors (4615096291).

9229784978 is an frugal number, since it uses more digits than its factorization.

9229784978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135868 (or 67935 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 65.

The square root of 9229784978 is about 96071.7699326915. The cubic root of 9229784978 is about 2097.6379320620.

The spelling of 9229784978 in words is "nine billion, two hundred twenty-nine million, seven hundred eighty-four thousand, nine hundred seventy-eight".