206430605 has 8 divisors (see below), whose sum is σ = 250500600. Its totient is φ = 163288576.

The previous prime is 206430599. The next prime is 206430607. The reversal of 206430605 is 506034602.

206430605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8099716 + 198330889 = 2846^2 + 14083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206430605 - 2¹⁰ = 206429581 is a prime.

It is a super-2 number, since 2×206430605² = 85227189361332050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206430607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231500 + ... + 232389.

It is an arithmetic number, because the mean of its divisors is an integer number (31312575).

Almost surely, 2^206430605 is an apocalyptic number.

It is an amenable number.

206430605 is a deficient number, since it is larger than the sum of its proper divisors (44069995).

206430605 is an equidigital number, since it uses as much as digits as its factorization.

206430605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463983.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 206430605 is about 14367.6930994506. The cubic root of 206430605 is about 591.0052812783.

The spelling of 206430605 in words is "two hundred six million, four hundred thirty thousand, six hundred five".