681108001 has 8 divisors (see below), whose sum is σ = 782443904. Its totient is φ = 580780800.

The previous prime is 681107983. The next prime is 681108013. The reversal of 681108001 is 100801186.

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 681108001 - 2⁹ = 681107489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681108091) 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, 250725 + ... + 253426.

It is an arithmetic number, because the mean of its divisors is an integer number (97805488).

Almost surely, 2^681108001 is an apocalyptic number.

It is an amenable number.

681108001 is a deficient number, since it is larger than the sum of its proper divisors (101335903).

681108001 is a wasteful number, since it uses less digits than its factorization.

681108001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504351.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 681108001 is about 26098.0459230188. The cubic root of 681108001 is about 879.8432920852.

Adding to 681108001 its reverse (100801186), we get a palindrome (781909187).

The spelling of 681108001 in words is "six hundred eighty-one million, one hundred eight thousand, one".