681774241 has 8 divisors (see below), whose sum is σ = 684969824. Its totient is φ = 678585600.

The previous prime is 681774221. The next prime is 681774259. The reversal of 681774241 is 142477186.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681774241 - 2⁷ = 681774113 is a prime.

It is a super-2 number, since 2×681774241² = 929632231382252162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 681774194 and 681774203.

It is not an unprimeable number, because it can be changed into a prime (681774221) 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 7 ways as a sum of consecutive naturals, for example, 321601 + ... + 323713.

It is an arithmetic number, because the mean of its divisors is an integer number (85621228).

Almost surely, 2^681774241 is an apocalyptic number.

It is an amenable number.

681774241 is a deficient number, since it is larger than the sum of its proper divisors (3195583).

681774241 is a wasteful number, since it uses less digits than its factorization.

681774241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471.

The product of its digits is 75264, while the sum is 40.

The square root of 681774241 is about 26110.8069771886. The cubic root of 681774241 is about 880.1300776207.

The spelling of 681774241 in words is "six hundred eighty-one million, seven hundred seventy-four thousand, two hundred forty-one".