168604001 has 2 divisors, whose sum is σ = 168604002. Its totient is φ = 168604000.

The previous prime is 168603997. The next prime is 168604031. The reversal of 168604001 is 100406861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145178401 + 23425600 = 12049^2 + 4840^2 .

It is a cyclic number.

It is not a de Polignac number, because 168604001 - 2² = 168603997 is a prime.

It is not a weakly prime, because it can be changed into another prime (168604031) 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 as a sum of consecutive naturals, namely, 84302000 + 84302001.

It is an arithmetic number, because the mean of its divisors is an integer number (84302001).

Almost surely, 2^168604001 is an apocalyptic number.

It is an amenable number.

168604001 is a deficient number, since it is larger than the sum of its proper divisors (1).

168604001 is an equidigital number, since it uses as much as digits as its factorization.

168604001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 168604001 is about 12984.7603366408. The cubic root of 168604001 is about 552.4453114313.

The spelling of 168604001 in words is "one hundred sixty-eight million, six hundred four thousand, one".