206468161 has 3 divisors (see below), whose sum is σ = 206482531. Its totient is φ = 206453792.

The previous prime is 206468149. The next prime is 206468173. The reversal of 206468161 is 161864602.

The square root of 206468161 is 14369.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (206468149) and next prime (206468173).

It can be written as a sum of positive squares in only one way, i.e., 124746561 + 81721600 = 11169^2 + 9040^2 .

It is not a de Polignac number, because 206468161 - 2⁹ = 206467649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206468131) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7185 + ... + 21553.

Almost surely, 2^206468161 is an apocalyptic number.

206468161 is the 14369-th square number.

206468161 is the 7185-th centered octagonal number.

It is an amenable number.

206468161 is a deficient number, since it is larger than the sum of its proper divisors (14370).

206468161 is an frugal number, since it uses more digits than its factorization.

206468161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28738 (or 14369 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The cubic root of 206468161 is about 591.0411197117.

It can be divided in two parts, 2064 and 68161, that added together give a square (70225 = 265²).

The spelling of 206468161 in words is "two hundred six million, four hundred sixty-eight thousand, one hundred sixty-one".