674784559 has 4 divisors (see below), whose sum is σ = 674838216. Its totient is φ = 674730904.

The previous prime is 674784547. The next prime is 674784571. The reversal of 674784559 is 955487476.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (674784547) and next prime (674784571).

It is a cyclic number.

It is not a de Polignac number, because 674784559 - 2⁵ = 674784527 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 (674784529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3357 + ... + 36889.

It is an arithmetic number, because the mean of its divisors is an integer number (168709554).

Almost surely, 2^674784559 is an apocalyptic number.

674784559 is a deficient number, since it is larger than the sum of its proper divisors (53657).

674784559 is a wasteful number, since it uses less digits than its factorization.

674784559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53656.

The product of its digits is 8467200, while the sum is 55.

The square root of 674784559 is about 25976.6156186675. The cubic root of 674784559 is about 877.1119851174. Note that the first 3 decimals are identical.

The spelling of 674784559 in words is "six hundred seventy-four million, seven hundred eighty-four thousand, five hundred fifty-nine".