30797321 has 2 divisors, whose sum is σ = 30797322. Its totient is φ = 30797320.

The previous prime is 30797311. The next prime is 30797323. The reversal of 30797321 is 12379703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17547721 + 13249600 = 4189^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 30797321 - 2¹⁸ = 30535177 is a prime.

Together with 30797323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30797323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15398660 + 15398661.

It is an arithmetic number, because the mean of its divisors is an integer number (15398661).

Almost surely, 2^30797321 is an apocalyptic number.

It is an amenable number.

30797321 is a deficient number, since it is larger than the sum of its proper divisors (1).

30797321 is an equidigital number, since it uses as much as digits as its factorization.

30797321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 30797321 is about 5549.5334038097. The cubic root of 30797321 is about 313.4519528499.

The spelling of 30797321 in words is "thirty million, seven hundred ninety-seven thousand, three hundred twenty-one".