206316745 has 4 divisors (see below), whose sum is σ = 247580100. Its totient is φ = 165053392.

The previous prime is 206316703. The next prime is 206316787. The reversal of 206316745 is 547613602.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (206316703) and next prime (206316787).

It can be written as a sum of positive squares in 2 ways, for example, as 34916281 + 171400464 = 5909^2 + 13092^2 .

It is a cyclic number.

It is not a de Polignac number, because 206316745 - 2²¹ = 204219593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206316745.

It is an unprimeable number.

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, 20631670 + ... + 20631679.

It is an arithmetic number, because the mean of its divisors is an integer number (61895025).

Almost surely, 2^206316745 is an apocalyptic number.

It is an amenable number.

206316745 is a deficient number, since it is larger than the sum of its proper divisors (41263355).

206316745 is an equidigital number, since it uses as much as digits as its factorization.

206316745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41263354.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 206316745 is about 14363.7301910054. The cubic root of 206316745 is about 590.8966019200.

The spelling of 206316745 in words is "two hundred six million, three hundred sixteen thousand, seven hundred forty-five".