206434427 has 2 divisors, whose sum is σ = 206434428. Its totient is φ = 206434426.

The previous prime is 206434421. The next prime is 206434429. The reversal of 206434427 is 724434602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206434427 - 2¹⁸ = 206172283 is a prime.

Together with 206434429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 206434393 and 206434402.

It is not a weakly prime, because it can be changed into another prime (206434421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103217213 + 103217214.

It is an arithmetic number, because the mean of its divisors is an integer number (103217214).

Almost surely, 2^206434427 is an apocalyptic number.

206434427 is a deficient number, since it is larger than the sum of its proper divisors (1).

206434427 is an equidigital number, since it uses as much as digits as its factorization.

206434427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 206434427 is about 14367.8261055735. The cubic root of 206434427 is about 591.0089286836.

The spelling of 206434427 in words is "two hundred six million, four hundred thirty-four thousand, four hundred twenty-seven".