208504001 has 2 divisors, whose sum is σ = 208504002. Its totient is φ = 208504000.

The previous prime is 208503941. The next prime is 208504013. The reversal of 208504001 is 100405802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153388225 + 55115776 = 12385^2 + 7424^2 .

It is a cyclic number.

It is not a de Polignac number, because 208504001 - 2⁶ = 208503937 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (208504061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104252000 + 104252001.

It is an arithmetic number, because the mean of its divisors is an integer number (104252001).

Almost surely, 2^208504001 is an apocalyptic number.

It is an amenable number.

208504001 is a deficient number, since it is larger than the sum of its proper divisors (1).

208504001 is an equidigital number, since it uses as much as digits as its factorization.

208504001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 208504001 is about 14439.6676208284. The cubic root of 208504001 is about 592.9773856793.

Adding to 208504001 its reverse (100405802), we get a palindrome (308909803).

The spelling of 208504001 in words is "two hundred eight million, five hundred four thousand, one".