206869051 has 2 divisors, whose sum is σ = 206869052. Its totient is φ = 206869050.

The previous prime is 206869031. The next prime is 206869081. The reversal of 206869051 is 150968602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206869051 - 2⁹ = 206868539 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206869051.

It is not a weakly prime, because it can be changed into another prime (206869021) 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 as a sum of consecutive naturals, namely, 103434525 + 103434526.

It is an arithmetic number, because the mean of its divisors is an integer number (103434526).

Almost surely, 2^206869051 is an apocalyptic number.

206869051 is a deficient number, since it is larger than the sum of its proper divisors (1).

206869051 is an equidigital number, since it uses as much as digits as its factorization.

206869051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 206869051 is about 14382.9430576638. The cubic root of 206869051 is about 591.4234051046.

It can be divided in two parts, 20 and 6869051, that added together give a triangular number (6869071 = T₃₇₀₆).

The spelling of 206869051 in words is "two hundred six million, eight hundred sixty-nine thousand, fifty-one".