9778983131 has 2 divisors, whose sum is σ = 9778983132. Its totient is φ = 9778983130.

The previous prime is 9778983113. The next prime is 9778983157. The reversal of 9778983131 is 1313898779.

Together with previous prime (9778983113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9778983131 - 2²⁶ = 9711874267 is a prime.

It is a super-2 number, since 2×9778983131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9778983161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4889491565 + 4889491566.

It is an arithmetic number, because the mean of its divisors is an integer number (4889491566).

Almost surely, 2^9778983131 is an apocalyptic number.

9778983131 is a deficient number, since it is larger than the sum of its proper divisors (1).

9778983131 is an equidigital number, since it uses as much as digits as its factorization.

9778983131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 56.

The square root of 9778983131 is about 98888.7411741094. The cubic root of 9778983131 is about 2138.4440848377. Note that the first 3 decimals are identical.

The spelling of 9778983131 in words is "nine billion, seven hundred seventy-eight million, nine hundred eighty-three thousand, one hundred thirty-one".