206464447 has 8 divisors (see below), whose sum is σ = 238048416. Its totient is φ = 175402752.

The previous prime is 206464441. The next prime is 206464463. The reversal of 206464447 is 744464602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-206464447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206464441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129718 + ... + 131299.

It is an arithmetic number, because the mean of its divisors is an integer number (29756052).

Almost surely, 2^206464447 is an apocalyptic number.

206464447 is a deficient number, since it is larger than the sum of its proper divisors (31583969).

206464447 is a wasteful number, since it uses less digits than its factorization.

206464447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261137.

The product of its (nonzero) digits is 129024, while the sum is 37.

The square root of 206464447 is about 14368.8707628679. The cubic root of 206464447 is about 591.0375757595.

The spelling of 206464447 in words is "two hundred six million, four hundred sixty-four thousand, four hundred forty-seven".