674636509 has 16 divisors (see below), whose sum is σ = 699814080. Its totient is φ = 649939840.

The previous prime is 674636489. The next prime is 674636561. The reversal of 674636509 is 905636476.

It is a cyclic number.

It is not a de Polignac number, because 674636509 - 2¹¹ = 674634461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674636569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1609902 + ... + 1610320.

It is an arithmetic number, because the mean of its divisors is an integer number (43738380).

Almost surely, 2^674636509 is an apocalyptic number.

It is an amenable number.

674636509 is a deficient number, since it is larger than the sum of its proper divisors (25177571).

674636509 is a wasteful number, since it uses less digits than its factorization.

674636509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 674636509 is about 25973.7657839598. The cubic root of 674636509 is about 877.0478333197.

The spelling of 674636509 in words is "six hundred seventy-four million, six hundred thirty-six thousand, five hundred nine".