206997061 has 2 divisors, whose sum is σ = 206997062. Its totient is φ = 206997060.

The previous prime is 206997023. The next prime is 206997067. The reversal of 206997061 is 160799602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144744961 + 62252100 = 12031^2 + 7890^2 .

It is a cyclic number.

It is not a de Polignac number, because 206997061 - 2⁹ = 206996549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206997067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103498530 + 103498531.

It is an arithmetic number, because the mean of its divisors is an integer number (103498531).

Almost surely, 2^206997061 is an apocalyptic number.

It is an amenable number.

206997061 is a deficient number, since it is larger than the sum of its proper divisors (1).

206997061 is an equidigital number, since it uses as much as digits as its factorization.

206997061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 206997061 is about 14387.3924322651. The cubic root of 206997061 is about 591.5453703432.

The spelling of 206997061 in words is "two hundred six million, nine hundred ninety-seven thousand, sixty-one".