206439810593 has 2 divisors, whose sum is σ = 206439810594. Its totient is φ = 206439810592.

The previous prime is 206439810587. The next prime is 206439810671. The reversal of 206439810593 is 395018934602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160022400784 + 46417409809 = 400028^2 + 215447^2 .

It is a cyclic number.

It is not a de Polignac number, because 206439810593 - 2¹² = 206439806497 is a prime.

It is not a weakly prime, because it can be changed into another prime (206439810583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103219905296 + 103219905297.

It is an arithmetic number, because the mean of its divisors is an integer number (103219905297).

Almost surely, 2^206439810593 is an apocalyptic number.

It is an amenable number.

206439810593 is a deficient number, since it is larger than the sum of its proper divisors (1).

206439810593 is an equidigital number, since it uses as much as digits as its factorization.

206439810593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 206439810593 in words is "two hundred six billion, four hundred thirty-nine million, eight hundred ten thousand, five hundred ninety-three".