206087149 has 4 divisors (see below), whose sum is σ = 207399964. Its totient is φ = 204774336.

The previous prime is 206087131. The next prime is 206087159. The reversal of 206087149 is 941780602.

206087149 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 96884649 + 109202500 = 9843^2 + 10450^2 .

It is a cyclic number.

It is not a de Polignac number, because 206087149 - 2²¹ = 203989997 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 (206087159) 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, 656172 + ... + 656485.

It is an arithmetic number, because the mean of its divisors is an integer number (51849991).

Almost surely, 2^206087149 is an apocalyptic number.

It is an amenable number.

206087149 is a deficient number, since it is larger than the sum of its proper divisors (1312815).

206087149 is a wasteful number, since it uses less digits than its factorization.

206087149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312814.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 206087149 is about 14355.7357526530. The cubic root of 206087149 is about 590.6773308951.

The spelling of 206087149 in words is "two hundred six million, eighty-seven thousand, one hundred forty-nine".