206423417 has 2 divisors, whose sum is σ = 206423418. Its totient is φ = 206423416.

The previous prime is 206423411. The next prime is 206423461. The reversal of 206423417 is 714324602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202663696 + 3759721 = 14236^2 + 1939^2 .

It is a cyclic number.

It is not a de Polignac number, because 206423417 - 2¹⁰ = 206422393 is a prime.

It is a super-2 number, since 2×206423417² = 85221254171911778, which contains 22 as substring.

It is a Chen prime.

It is equal to p_11414756 and since 206423417 and 11414756 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206423417.

It is not a weakly prime, because it can be changed into another prime (206423411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103211708 + 103211709.

It is an arithmetic number, because the mean of its divisors is an integer number (103211709).

Almost surely, 2^206423417 is an apocalyptic number.

It is an amenable number.

206423417 is a deficient number, since it is larger than the sum of its proper divisors (1).

206423417 is an equidigital number, since it uses as much as digits as its factorization.

206423417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 206423417 is about 14367.4429527317. The cubic root of 206423417 is about 590.9984215150.

The spelling of 206423417 in words is "two hundred six million, four hundred twenty-three thousand, four hundred seventeen".