206745013 has 2 divisors, whose sum is σ = 206745014. Its totient is φ = 206745012.

The previous prime is 206744981. The next prime is 206745037. The reversal of 206745013 is 310547602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151733124 + 55011889 = 12318^2 + 7417^2 .

It is a cyclic number.

It is not a de Polignac number, because 206745013 - 2⁵ = 206744981 is a prime.

It is equal to p_11431576 and since 206745013 and 11431576 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206745053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103372506 + 103372507.

It is an arithmetic number, because the mean of its divisors is an integer number (103372507).

Almost surely, 2^206745013 is an apocalyptic number.

It is an amenable number.

206745013 is a deficient number, since it is larger than the sum of its proper divisors (1).

206745013 is an equidigital number, since it uses as much as digits as its factorization.

206745013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 206745013 is about 14378.6304285213. The cubic root of 206745013 is about 591.3051762979.

The spelling of 206745013 in words is "two hundred six million, seven hundred forty-five thousand, thirteen".