206438747 has 2 divisors, whose sum is σ = 206438748. Its totient is φ = 206438746.

The previous prime is 206438719. The next prime is 206438797. The reversal of 206438747 is 747834602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206438747 - 2¹⁰ = 206437723 is a prime.

It is not a weakly prime, because it can be changed into another prime (206438707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103219373 + 103219374.

It is an arithmetic number, because the mean of its divisors is an integer number (103219374).

Almost surely, 2^206438747 is an apocalyptic number.

206438747 is a deficient number, since it is larger than the sum of its proper divisors (1).

206438747 is an equidigital number, since it uses as much as digits as its factorization.

206438747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 41.

The square root of 206438747 is about 14367.9764406822. The cubic root of 206438747 is about 591.0130512853.

The spelling of 206438747 in words is "two hundred six million, four hundred thirty-eight thousand, seven hundred forty-seven".