205998349 has 2 divisors, whose sum is σ = 205998350. Its totient is φ = 205998348.

The previous prime is 205998343. The next prime is 205998371. The reversal of 205998349 is 943899502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185232100 + 20766249 = 13610^2 + 4557^2 .

It is a cyclic number.

It is not a de Polignac number, because 205998349 - 2²¹ = 203901197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205998343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102999174 + 102999175.

It is an arithmetic number, because the mean of its divisors is an integer number (102999175).

Almost surely, 2^205998349 is an apocalyptic number.

It is an amenable number.

205998349 is a deficient number, since it is larger than the sum of its proper divisors (1).

205998349 is an equidigital number, since it uses as much as digits as its factorization.

205998349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 205998349 is about 14352.6425789818. The cubic root of 205998349 is about 590.5924805738.

The spelling of 205998349 in words is "two hundred five million, nine hundred ninety-eight thousand, three hundred forty-nine".