674886581 has 2 divisors, whose sum is σ = 674886582. Its totient is φ = 674886580.

The previous prime is 674886559. The next prime is 674886599. The reversal of 674886581 is 185688476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394022500 + 280864081 = 19850^2 + 16759^2 .

It is a cyclic number.

It is not a de Polignac number, because 674886581 - 2¹⁰ = 674885557 is a prime.

It is a super-2 number, since 2×674886581² = 910943794427739122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674886551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337443290 + 337443291.

It is an arithmetic number, because the mean of its divisors is an integer number (337443291).

Almost surely, 2^674886581 is an apocalyptic number.

It is an amenable number.

674886581 is a deficient number, since it is larger than the sum of its proper divisors (1).

674886581 is an equidigital number, since it uses as much as digits as its factorization.

674886581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 53.

The square root of 674886581 is about 25978.5792721619. The cubic root of 674886581 is about 877.1561869832.

The spelling of 674886581 in words is "six hundred seventy-four million, eight hundred eighty-six thousand, five hundred eighty-one".