674231681 has 6 divisors (see below), whose sum is σ = 677068182. Its totient is φ = 671398560.

The previous prime is 674231671. The next prime is 674231699. The reversal of 674231681 is 186132476.

674231681 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 3 ways, for example, as 65869456 + 608362225 = 8116^2 + 24665^2 .

It is a de Polignac number, because none of the positive numbers 2^k-674231681 is a prime.

It is a super-2 number, since 2×674231681² = 909176719328171522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674231641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 434495 + ... + 436043.

It is an arithmetic number, because the mean of its divisors is an integer number (112844697).

Almost surely, 2^674231681 is an apocalyptic number.

It is an amenable number.

674231681 is a deficient number, since it is larger than the sum of its proper divisors (2836501).

674231681 is an frugal number, since it uses more digits than its factorization.

674231681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379 (or 1830 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 674231681 is about 25965.9715974581. The cubic root of 674231681 is about 876.8723686767.

The spelling of 674231681 in words is "six hundred seventy-four million, two hundred thirty-one thousand, six hundred eighty-one".