206990411 has 2 divisors, whose sum is σ = 206990412. Its totient is φ = 206990410.

The previous prime is 206990369. The next prime is 206990431. The reversal of 206990411 is 114099602.

206990411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206990411 is a prime.

It is not a weakly prime, because it can be changed into another prime (206990431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103495205 + 103495206.

It is an arithmetic number, because the mean of its divisors is an integer number (103495206).

Almost surely, 2^206990411 is an apocalyptic number.

206990411 is a deficient number, since it is larger than the sum of its proper divisors (1).

206990411 is an equidigital number, since it uses as much as digits as its factorization.

206990411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 206990411 is about 14387.1613252928. The cubic root of 206990411 is about 591.5390356013.

The spelling of 206990411 in words is "two hundred six million, nine hundred ninety thousand, four hundred eleven".