206868451 has 4 divisors (see below), whose sum is σ = 206918712. Its totient is φ = 206818192.

The previous prime is 206868449. The next prime is 206868469. The reversal of 206868451 is 154868602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206868451 - 2¹ = 206868449 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206868421) 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, 18346 + ... + 27391.

It is an arithmetic number, because the mean of its divisors is an integer number (51729678).

Almost surely, 2^206868451 is an apocalyptic number.

206868451 is a deficient number, since it is larger than the sum of its proper divisors (50261).

206868451 is an equidigital number, since it uses as much as digits as its factorization.

206868451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50260.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 206868451 is about 14382.9221996088. The cubic root of 206868451 is about 591.4228333188.

The spelling of 206868451 in words is "two hundred six million, eight hundred sixty-eight thousand, four hundred fifty-one".