206867825 has 6 divisors (see below), whose sum is σ = 256516134. Its totient is φ = 165494240.

The previous prime is 206867813. The next prime is 206867827. The reversal of 206867825 is 528768602.

It can be written as a sum of positive squares in 3 ways, for example, as 10195249 + 196672576 = 3193^2 + 14024^2 .

It is not a de Polignac number, because 206867825 - 2⁴ = 206867809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206867827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4137332 + ... + 4137381.

It is an arithmetic number, because the mean of its divisors is an integer number (42752689).

Almost surely, 2^206867825 is an apocalyptic number.

206867825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206867825 is a deficient number, since it is larger than the sum of its proper divisors (49648309).

206867825 is an equidigital number, since it uses as much as digits as its factorization.

206867825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8274723 (or 8274718 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 206867825 is about 14382.9004376725. The cubic root of 206867825 is about 591.4222367544.

The spelling of 206867825 in words is "two hundred six million, eight hundred sixty-seven thousand, eight hundred twenty-five".