206394497 has 4 divisors (see below), whose sum is σ = 213052416. Its totient is φ = 199736580.

The previous prime is 206394493. The next prime is 206394499. The reversal of 206394497 is 794493602.

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 206394497 - 2² = 206394493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206394491) 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 in 3 ways as a sum of consecutive naturals, for example, 3328913 + ... + 3328974.

It is an arithmetic number, because the mean of its divisors is an integer number (53263104).

Almost surely, 2^206394497 is an apocalyptic number.

It is an amenable number.

206394497 is a deficient number, since it is larger than the sum of its proper divisors (6657919).

206394497 is an equidigital number, since it uses as much as digits as its factorization.

206394497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657918.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 206394497 is about 14366.4364753407. The cubic root of 206394497 is about 590.9708205241.

The spelling of 206394497 in words is "two hundred six million, three hundred ninety-four thousand, four hundred ninety-seven".