206375137 has 2 divisors, whose sum is σ = 206375138. Its totient is φ = 206375136.

The previous prime is 206375123. The next prime is 206375149. The reversal of 206375137 is 731573602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197796096 + 8579041 = 14064^2 + 2929^2 .

It is a cyclic number.

It is not a de Polignac number, because 206375137 - 2¹⁵ = 206342369 is a prime.

It is not a weakly prime, because it can be changed into another prime (206375237) 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, 103187568 + 103187569.

It is an arithmetic number, because the mean of its divisors is an integer number (103187569).

Almost surely, 2^206375137 is an apocalyptic number.

It is an amenable number.

206375137 is a deficient number, since it is larger than the sum of its proper divisors (1).

206375137 is an equidigital number, since it uses as much as digits as its factorization.

206375137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 206375137 is about 14365.7626668409. The cubic root of 206375137 is about 590.9523420714.

The spelling of 206375137 in words is "two hundred six million, three hundred seventy-five thousand, one hundred thirty-seven".