206397393 has 4 divisors (see below), whose sum is σ = 275196528. Its totient is φ = 137598260.

The previous prime is 206397371. The next prime is 206397397. The reversal of 206397393 is 393793602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206397393 - 2¹⁶ = 206331857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206397397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34399563 + ... + 34399568.

It is an arithmetic number, because the mean of its divisors is an integer number (68799132).

Almost surely, 2^206397393 is an apocalyptic number.

It is an amenable number.

206397393 is a deficient number, since it is larger than the sum of its proper divisors (68799135).

206397393 is an equidigital number, since it uses as much as digits as its factorization.

206397393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68799134.

The product of its (nonzero) digits is 183708, while the sum is 42.

The square root of 206397393 is about 14366.5372654652. The cubic root of 206397393 is about 590.9735845569.

The spelling of 206397393 in words is "two hundred six million, three hundred ninety-seven thousand, three hundred ninety-three".