206696947 has 2 divisors, whose sum is σ = 206696948. Its totient is φ = 206696946.

The previous prime is 206696927. The next prime is 206696951. The reversal of 206696947 is 749696602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206696947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206696947.

It is not a weakly prime, because it can be changed into another prime (206696927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103348473 + 103348474.

It is an arithmetic number, because the mean of its divisors is an integer number (103348474).

Almost surely, 2^206696947 is an apocalyptic number.

206696947 is a deficient number, since it is larger than the sum of its proper divisors (1).

206696947 is an equidigital number, since it uses as much as digits as its factorization.

206696947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 206696947 is about 14376.9588926170. The cubic root of 206696947 is about 591.2593487073.

The spelling of 206696947 in words is "two hundred six million, six hundred ninety-six thousand, nine hundred forty-seven".