9978726133 has 2 divisors, whose sum is σ = 9978726134. Its totient is φ = 9978726132.

The previous prime is 9978726101. The next prime is 9978726193. The reversal of 9978726133 is 3316278799.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9642847204 + 335878929 = 98198^2 + 18327^2 .

It is a cyclic number.

It is not a de Polignac number, because 9978726133 - 2⁵ = 9978726101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9978726193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989363066 + 4989363067.

It is an arithmetic number, because the mean of its divisors is an integer number (4989363067).

Almost surely, 2^9978726133 is an apocalyptic number.

It is an amenable number.

9978726133 is a deficient number, since it is larger than the sum of its proper divisors (1).

9978726133 is an equidigital number, since it uses as much as digits as its factorization.

9978726133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 55.

The square root of 9978726133 is about 99893.5740325673. The cubic root of 9978726133 is about 2152.9058334606.

The spelling of 9978726133 in words is "nine billion, nine hundred seventy-eight million, seven hundred twenty-six thousand, one hundred thirty-three".