209798033 has 2 divisors, whose sum is σ = 209798034. Its totient is φ = 209798032.

The previous prime is 209798027. The next prime is 209798051. The reversal of 209798033 is 330897902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139523344 + 70274689 = 11812^2 + 8383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209798033 is a prime.

It is not a weakly prime, because it can be changed into another prime (209798023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104899016 + 104899017.

It is an arithmetic number, because the mean of its divisors is an integer number (104899017).

Almost surely, 2^209798033 is an apocalyptic number.

It is an amenable number.

209798033 is a deficient number, since it is larger than the sum of its proper divisors (1).

209798033 is an equidigital number, since it uses as much as digits as its factorization.

209798033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 209798033 is about 14484.4065463518. The cubic root of 209798033 is about 594.2015823966.

The spelling of 209798033 in words is "two hundred nine million, seven hundred ninety-eight thousand, thirty-three".