206391345 has 8 divisors (see below), whose sum is σ = 330226176. Its totient is φ = 110075376.

The previous prime is 206391343. The next prime is 206391349. The reversal of 206391345 is 543193602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206391345 - 2¹ = 206391343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206391343) 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 7 ways as a sum of consecutive naturals, for example, 6879697 + ... + 6879726.

It is an arithmetic number, because the mean of its divisors is an integer number (41278272).

Almost surely, 2^206391345 is an apocalyptic number.

It is an amenable number.

206391345 is a deficient number, since it is larger than the sum of its proper divisors (123834831).

206391345 is a wasteful number, since it uses less digits than its factorization.

206391345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13759431.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 206391345 is about 14366.3267747883. The cubic root of 206391345 is about 590.9678121275.

The spelling of 206391345 in words is "two hundred six million, three hundred ninety-one thousand, three hundred forty-five".