206049917 has 2 divisors, whose sum is σ = 206049918. Its totient is φ = 206049916.

The previous prime is 206049871. The next prime is 206049923. The reversal of 206049917 is 719940602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201810436 + 4239481 = 14206^2 + 2059^2 .

It is a cyclic number.

It is not a de Polignac number, because 206049917 - 2¹⁸ = 205787773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206049317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103024958 + 103024959.

It is an arithmetic number, because the mean of its divisors is an integer number (103024959).

Almost surely, 2^206049917 is an apocalyptic number.

It is an amenable number.

206049917 is a deficient number, since it is larger than the sum of its proper divisors (1).

206049917 is an equidigital number, since it uses as much as digits as its factorization.

206049917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 206049917 is about 14354.4389301707. The cubic root of 206049917 is about 590.6417578814.

The spelling of 206049917 in words is "two hundred six million, forty-nine thousand, nine hundred seventeen".