674006321 has 2 divisors, whose sum is σ = 674006322. Its totient is φ = 674006320.

The previous prime is 674006317. The next prime is 674006423. The reversal of 674006321 is 123600476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636048400 + 37957921 = 25220^2 + 6161^2 .

It is a cyclic number.

It is not a de Polignac number, because 674006321 - 2² = 674006317 is a prime.

It is not a weakly prime, because it can be changed into another prime (674006521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337003160 + 337003161.

It is an arithmetic number, because the mean of its divisors is an integer number (337003161).

Almost surely, 2^674006321 is an apocalyptic number.

It is an amenable number.

674006321 is a deficient number, since it is larger than the sum of its proper divisors (1).

674006321 is an equidigital number, since it uses as much as digits as its factorization.

674006321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 674006321 is about 25961.6317091203. The cubic root of 674006321 is about 876.7746604340.

Adding to 674006321 its reverse (123600476), we get a palindrome (797606797).

The spelling of 674006321 in words is "six hundred seventy-four million, six thousand, three hundred twenty-one".