674649 has 10 divisors (see below), whose sum is σ = 1007930. Its totient is φ = 449712.

The previous prime is 674647. The next prime is 674669. The reversal of 674649 is 946476.

674649 is a `hidden beast` number, since 6 + 7 + 4 + 649 = 666.

674649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 455625 + 219024 = 675^2 + 468^2 .

It is not a de Polignac number, because 674649 - 2¹ = 674647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674647) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4084 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (100793).

2⁶⁷⁴⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

674649 is a deficient number, since it is larger than the sum of its proper divisors (333281).

674649 is an equidigital number, since it uses as much as digits as its factorization.

674649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8341 (or 8332 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 674649 is about 821.3701966836. The cubic root of 674649 is about 87.7053246179.

The spelling of 674649 in words is "six hundred seventy-four thousand, six hundred forty-nine".