681000001 has 8 divisors (see below), whose sum is σ = 743327424. Its totient is φ = 618742320.

The previous prime is 680999989. The next prime is 681000013. The reversal of 681000001 is 100000186.

It is an interprime number because it is at equal distance from previous prime (680999989) and next prime (681000013).

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 681000001 - 2¹¹ = 680997953 is a prime.

It is a super-2 number, since 2×681000001² = 927522002724000002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681000091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4156 + ... + 37138.

It is an arithmetic number, because the mean of its divisors is an integer number (92915928).

Almost surely, 2^681000001 is an apocalyptic number.

It is an amenable number.

681000001 is a deficient number, since it is larger than the sum of its proper divisors (62327423).

681000001 is a wasteful number, since it uses less digits than its factorization.

681000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34871.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 681000001 is about 26095.9767205598. The cubic root of 681000001 is about 879.7967854625.

Adding to 681000001 its reverse (100000186), we get a palindrome (781000187).

The spelling of 681000001 in words is "six hundred eighty-one million, one", and thus it is an aban number.