973171321 has 2 divisors, whose sum is σ = 973171322. Its totient is φ = 973171320.

The previous prime is 973171267. The next prime is 973171327. The reversal of 973171321 is 123171379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958769296 + 14402025 = 30964^2 + 3795^2 .

It is an emirp because it is prime and its reverse (123171379) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-973171321 is a prime.

It is not a weakly prime, because it can be changed into another prime (973171327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486585660 + 486585661.

It is an arithmetic number, because the mean of its divisors is an integer number (486585661).

Almost surely, 2^973171321 is an apocalyptic number.

It is an amenable number.

973171321 is a deficient number, since it is larger than the sum of its proper divisors (1).

973171321 is an equidigital number, since it uses as much as digits as its factorization.

973171321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938, while the sum is 34.

The square root of 973171321 is about 31195.6939496463. The cubic root of 973171321 is about 990.9759178981.

The spelling of 973171321 in words is "nine hundred seventy-three million, one hundred seventy-one thousand, three hundred twenty-one".