206801129 has 4 divisors (see below), whose sum is σ = 206831184. Its totient is φ = 206771076.

The previous prime is 206801113. The next prime is 206801137. The reversal of 206801129 is 921108602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 206801129 - 2⁴ = 206801113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206801429) 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 3 ways as a sum of consecutive naturals, for example, 974 + ... + 20360.

It is an arithmetic number, because the mean of its divisors is an integer number (51707796).

Almost surely, 2^206801129 is an apocalyptic number.

It is an amenable number.

206801129 is a deficient number, since it is larger than the sum of its proper divisors (30055).

206801129 is a wasteful number, since it uses less digits than its factorization.

206801129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30054.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 206801129 is about 14380.5816641748. The cubic root of 206801129 is about 591.3586700181.

The spelling of 206801129 in words is "two hundred six million, eight hundred one thousand, one hundred twenty-nine".