973171421 has 2 divisors, whose sum is σ = 973171422. Its totient is φ = 973171420.

The previous prime is 973171337. The next prime is 973171439. The reversal of 973171421 is 124171379.

973171421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 962860900 + 10310521 = 31030^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 973171421 - 2¹⁴ = 973155037 is a prime.

It is a super-2 number, since 2×973171421² = 1894125229302318482, which contains 22 as substring.

It is equal to p_49551902 and since 973171421 and 49551902 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (973171471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486585710 + 486585711.

It is an arithmetic number, because the mean of its divisors is an integer number (486585711).

Almost surely, 2^973171421 is an apocalyptic number.

It is an amenable number.

973171421 is a deficient number, since it is larger than the sum of its proper divisors (1).

973171421 is an equidigital number, since it uses as much as digits as its factorization.

973171421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 973171421 is about 31195.6955524316. The cubic root of 973171421 is about 990.9759518413.

The spelling of 973171421 in words is "nine hundred seventy-three million, one hundred seventy-one thousand, four hundred twenty-one".