206759745 has 12 divisors (see below), whose sum is σ = 358383636. Its totient is φ = 110271840.

The previous prime is 206759743. The next prime is 206759753. The reversal of 206759745 is 547957602.

It can be written as a sum of positive squares in 2 ways, for example, as 37161216 + 169598529 = 6096^2 + 13023^2 .

It is not a de Polignac number, because 206759745 - 2¹ = 206759743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4594661 = 206759745 / (2 + 0 + 6 + 7 + 5 + 9 + 7 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 206759745.

It is not an unprimeable number, because it can be changed into a prime (206759741) 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 11 ways as a sum of consecutive naturals, for example, 2297286 + ... + 2297375.

It is an arithmetic number, because the mean of its divisors is an integer number (29865303).

Almost surely, 2^206759745 is an apocalyptic number.

It is an amenable number.

206759745 is a deficient number, since it is larger than the sum of its proper divisors (151623891).

206759745 is a wasteful number, since it uses less digits than its factorization.

206759745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594672 (or 4594669 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 206759745 is about 14379.1427074078. The cubic root of 206759745 is about 591.3192208140.

The spelling of 206759745 in words is "two hundred six million, seven hundred fifty-nine thousand, seven hundred forty-five".