1688806001 has 2 divisors, whose sum is σ = 1688806002. Its totient is φ = 1688806000.

The previous prime is 1688805991. The next prime is 1688806057. The reversal of 1688806001 is 1006088861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1671174400 + 17631601 = 40880^2 + 4199^2 .

It is an emirp because it is prime and its reverse (1006088861) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1009088891 and 1988809001.

It is a cyclic number.

It is not a de Polignac number, because 1688806001 - 2¹⁰ = 1688804977 is a prime.

It is a super-2 number, since 2×1688806001² = 5704131418027224002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1688802001) 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 as a sum of consecutive naturals, namely, 844403000 + 844403001.

It is an arithmetic number, because the mean of its divisors is an integer number (844403001).

Almost surely, 2^1688806001 is an apocalyptic number.

It is an amenable number.

1688806001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688806001 is an equidigital number, since it uses as much as digits as its factorization.

1688806001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1688806001 is about 41095.0848764180. The cubic root of 1688806001 is about 1190.8578427198.

The spelling of 1688806001 in words is "one billion, six hundred eighty-eight million, eight hundred six thousand, one".