973897321 has 2 divisors, whose sum is σ = 973897322. Its totient is φ = 973897320.

The previous prime is 973897291. The next prime is 973897339. The reversal of 973897321 is 123798379.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 710808921 + 263088400 = 26661^2 + 16220^2 .

It is a cyclic number.

It is not a de Polignac number, because 973897321 - 2¹³ = 973889129 is a prime.

It is not a weakly prime, because it can be changed into another prime (973897621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486948660 + 486948661.

It is an arithmetic number, because the mean of its divisors is an integer number (486948661).

Almost surely, 2^973897321 is an apocalyptic number.

It is an amenable number.

973897321 is a deficient number, since it is larger than the sum of its proper divisors (1).

973897321 is an equidigital number, since it uses as much as digits as its factorization.

973897321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 973897321 is about 31207.3280016089. The cubic root of 973897321 is about 991.2222841403. Note that the first 4 decimals are identical.

The spelling of 973897321 in words is "nine hundred seventy-three million, eight hundred ninety-seven thousand, three hundred twenty-one".