206693393 has 2 divisors, whose sum is σ = 206693394. Its totient is φ = 206693392.

The previous prime is 206693371. The next prime is 206693471. The reversal of 206693393 is 393396602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162231169 + 44462224 = 12737^2 + 6668^2 .

It is a cyclic number.

It is not a de Polignac number, because 206693393 - 2⁶ = 206693329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206693393.

It is not a weakly prime, because it can be changed into another prime (206693093) 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, 103346696 + 103346697.

It is an arithmetic number, because the mean of its divisors is an integer number (103346697).

Almost surely, 2^206693393 is an apocalyptic number.

It is an amenable number.

206693393 is a deficient number, since it is larger than the sum of its proper divisors (1).

206693393 is an equidigital number, since it uses as much as digits as its factorization.

206693393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 41.

The square root of 206693393 is about 14376.8352915376. The cubic root of 206693393 is about 591.2559599332.

It can be divided in two parts, 2066 and 93393, that added together give a palindrome (95459).

The spelling of 206693393 in words is "two hundred six million, six hundred ninety-three thousand, three hundred ninety-three".