208494331 has 2 divisors, whose sum is σ = 208494332. Its totient is φ = 208494330.

The previous prime is 208494289. The next prime is 208494439. The reversal of 208494331 is 133494802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208494331 - 2⁷ = 208494203 is a prime.

It is a super-2 number, since 2×208494331² = 86939772118275122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (208494631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104247165 + 104247166.

It is an arithmetic number, because the mean of its divisors is an integer number (104247166).

Almost surely, 2^208494331 is an apocalyptic number.

208494331 is a deficient number, since it is larger than the sum of its proper divisors (1).

208494331 is an equidigital number, since it uses as much as digits as its factorization.

208494331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 208494331 is about 14439.3327754436. The cubic root of 208494331 is about 592.9682185011.

The spelling of 208494331 in words is "two hundred eight million, four hundred ninety-four thousand, three hundred thirty-one".