973636398181 has 2 divisors, whose sum is σ = 973636398182. Its totient is φ = 973636398180.

The previous prime is 973636398167. The next prime is 973636398193. The reversal of 973636398181 is 181893636379.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 550660464225 + 422975933956 = 742065^2 + 650366^2 .

It is a cyclic number.

It is not a de Polignac number, because 973636398181 - 2⁵ = 973636398149 is a prime.

It is a super-2 number, since 2×973636398181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (973636398101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486818199090 + 486818199091.

It is an arithmetic number, because the mean of its divisors is an integer number (486818199091).

Almost surely, 2^973636398181 is an apocalyptic number.

It is an amenable number.

973636398181 is a deficient number, since it is larger than the sum of its proper divisors (1).

973636398181 is an equidigital number, since it uses as much as digits as its factorization.

973636398181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35271936, while the sum is 64.

The spelling of 973636398181 in words is "nine hundred seventy-three billion, six hundred thirty-six million, three hundred ninety-eight thousand, one hundred eighty-one".