674435221 has 2 divisors, whose sum is σ = 674435222. Its totient is φ = 674435220.

The previous prime is 674435207. The next prime is 674435249. The reversal of 674435221 is 122534476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436350321 + 238084900 = 20889^2 + 15430^2 .

It is a cyclic number.

It is not a de Polignac number, because 674435221 - 2¹¹ = 674433173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674435621) 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, 337217610 + 337217611.

It is an arithmetic number, because the mean of its divisors is an integer number (337217611).

Almost surely, 2^674435221 is an apocalyptic number.

It is an amenable number.

674435221 is a deficient number, since it is larger than the sum of its proper divisors (1).

674435221 is an equidigital number, since it uses as much as digits as its factorization.

674435221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The square root of 674435221 is about 25969.8906620725. The cubic root of 674435221 is about 876.9605978171.

Adding to 674435221 its reverse (122534476), we get a palindrome (796969697).

The spelling of 674435221 in words is "six hundred seventy-four million, four hundred thirty-five thousand, two hundred twenty-one".