674781445 has 16 divisors (see below), whose sum is σ = 872775792. Its totient is φ = 497871360.

The previous prime is 674781439. The next prime is 674781449. The reversal of 674781445 is 544187476.

It can be written as a sum of positive squares in 8 ways, for example, as 2883204 + 671898241 = 1698^2 + 25921^2 .

It is not a de Polignac number, because 674781445 - 2⁹ = 674780933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 674781395 and 674781404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674781449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85465 + ... + 93025.

It is an arithmetic number, because the mean of its divisors is an integer number (54548487).

Almost surely, 2^674781445 is an apocalyptic number.

674781445 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

674781445 is a deficient number, since it is larger than the sum of its proper divisors (197994347).

674781445 is a wasteful number, since it uses less digits than its factorization.

674781445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8952.

The product of its digits is 752640, while the sum is 46.

The square root of 674781445 is about 25976.5556800743. Note that the first 3 decimals coincide. The cubic root of 674781445 is about 877.1106358814.

The spelling of 674781445 in words is "six hundred seventy-four million, seven hundred eighty-one thousand, four hundred forty-five".