206252749 has 4 divisors (see below), whose sum is σ = 208379164. Its totient is φ = 204126336.

The previous prime is 206252747. The next prime is 206252801. The reversal of 206252749 is 947252602.

It is a happy number.

206252749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 110565225 + 95687524 = 10515^2 + 9782^2 .

It is a cyclic number.

It is not a de Polignac number, because 206252749 - 2¹ = 206252747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206252741) 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, 1063062 + ... + 1063255.

It is an arithmetic number, because the mean of its divisors is an integer number (52094791).

Almost surely, 2^206252749 is an apocalyptic number.

It is an amenable number.

206252749 is a deficient number, since it is larger than the sum of its proper divisors (2126415).

206252749 is an equidigital number, since it uses as much as digits as its factorization.

206252749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126414.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 206252749 is about 14361.5023239214. The cubic root of 206252749 is about 590.8355001911.

The spelling of 206252749 in words is "two hundred six million, two hundred fifty-two thousand, seven hundred forty-nine".