206074997 has 2 divisors, whose sum is σ = 206074998. Its totient is φ = 206074996.

The previous prime is 206074991. The next prime is 206075021. The reversal of 206074997 is 799470602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199346161 + 6728836 = 14119^2 + 2594^2 .

It is a cyclic number.

It is not a de Polignac number, because 206074997 - 2²⁴ = 189297781 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 (206074991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103037498 + 103037499.

It is an arithmetic number, because the mean of its divisors is an integer number (103037499).

Almost surely, 2^206074997 is an apocalyptic number.

It is an amenable number.

206074997 is a deficient number, since it is larger than the sum of its proper divisors (1).

206074997 is an equidigital number, since it uses as much as digits as its factorization.

206074997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 206074997 is about 14355.3125009524. The cubic root of 206074997 is about 590.6657208358.

The spelling of 206074997 in words is "two hundred six million, seventy-four thousand, nine hundred ninety-seven".