674384549 has 2 divisors, whose sum is σ = 674384550. Its totient is φ = 674384548.

The previous prime is 674384521. The next prime is 674384567. The reversal of 674384549 is 945483476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587092900 + 87291649 = 24230^2 + 9343^2 .

It is a cyclic number.

It is not a de Polignac number, because 674384549 - 2²⁰ = 673335973 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 674384497 and 674384506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674984549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337192274 + 337192275.

It is an arithmetic number, because the mean of its divisors is an integer number (337192275).

Almost surely, 2^674384549 is an apocalyptic number.

It is an amenable number.

674384549 is a deficient number, since it is larger than the sum of its proper divisors (1).

674384549 is an equidigital number, since it uses as much as digits as its factorization.

674384549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 50.

The square root of 674384549 is about 25968.9150524237. The cubic root of 674384549 is about 876.9386345215.

The spelling of 674384549 in words is "six hundred seventy-four million, three hundred eighty-four thousand, five hundred forty-nine".