674384521 has 2 divisors, whose sum is σ = 674384522. Its totient is φ = 674384520.

The previous prime is 674384507. The next prime is 674384549. The reversal of 674384521 is 125483476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367258896 + 307125625 = 19164^2 + 17525^2 .

It is a cyclic number.

It is not a de Polignac number, because 674384521 - 2⁵ = 674384489 is a prime.

It is not a weakly prime, because it can be changed into another prime (674384591) 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, 337192260 + 337192261.

It is an arithmetic number, because the mean of its divisors is an integer number (337192261).

Almost surely, 2^674384521 is an apocalyptic number.

It is an amenable number.

674384521 is a deficient number, since it is larger than the sum of its proper divisors (1).

674384521 is an equidigital number, since it uses as much as digits as its factorization.

674384521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 40.

The square root of 674384521 is about 25968.9145133176. The cubic root of 674384521 is about 876.9386223848.

The spelling of 674384521 in words is "six hundred seventy-four million, three hundred eighty-four thousand, five hundred twenty-one".