206261454349 has 2 divisors, whose sum is σ = 206261454350. Its totient is φ = 206261454348.

The previous prime is 206261454283. The next prime is 206261454379. The reversal of 206261454349 is 943454162602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205827357124 + 434097225 = 453682^2 + 20835^2 .

It is a cyclic number.

It is not a de Polignac number, because 206261454349 - 2⁷ = 206261454221 is a prime.

It is a super-2 number, since 2×206261454349² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206261454299 and 206261454308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206261454379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103130727174 + 103130727175.

It is an arithmetic number, because the mean of its divisors is an integer number (103130727175).

Almost surely, 2^206261454349 is an apocalyptic number.

It is an amenable number.

206261454349 is a deficient number, since it is larger than the sum of its proper divisors (1).

206261454349 is an equidigital number, since it uses as much as digits as its factorization.

206261454349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 206261454349 in words is "two hundred six billion, two hundred sixty-one million, four hundred fifty-four thousand, three hundred forty-nine".