2003866001 has 2 divisors, whose sum is σ = 2003866002. Its totient is φ = 2003866000.

The previous prime is 2003865979. The next prime is 2003866013. The reversal of 2003866001 is 1006683002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1440278401 + 563587600 = 37951^2 + 23740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003866001 - 2¹⁸ = 2003603857 is a prime.

It is not a weakly prime, because it can be changed into another prime (2003866201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001933000 + 1001933001.

It is an arithmetic number, because the mean of its divisors is an integer number (1001933001).

Almost surely, 2^2003866001 is an apocalyptic number.

It is an amenable number.

2003866001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003866001 is an equidigital number, since it uses as much as digits as its factorization.

2003866001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2003866001 is about 44764.5618877254. The cubic root of 2003866001 is about 1260.7323367197.

The spelling of 2003866001 in words is "two billion, three million, eight hundred sixty-six thousand, one".