674311321 has 2 divisors, whose sum is σ = 674311322. Its totient is φ = 674311320.

The previous prime is 674311291. The next prime is 674311357. The reversal of 674311321 is 123113476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451137600 + 223173721 = 21240^2 + 14939^2 .

It is a cyclic number.

It is not a de Polignac number, because 674311321 - 2⁵ = 674311289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 674311321.

It is not a weakly prime, because it can be changed into another prime (674311381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337155660 + 337155661.

It is an arithmetic number, because the mean of its divisors is an integer number (337155661).

Almost surely, 2^674311321 is an apocalyptic number.

It is an amenable number.

674311321 is a deficient number, since it is larger than the sum of its proper divisors (1).

674311321 is an equidigital number, since it uses as much as digits as its factorization.

674311321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 674311321 is about 25967.5050977178. The cubic root of 674311321 is about 876.9068925987.

Adding to 674311321 its reverse (123113476), we get a palindrome (797424797).

The spelling of 674311321 in words is "six hundred seventy-four million, three hundred eleven thousand, three hundred twenty-one".