206064861 has 8 divisors (see below), whose sum is σ = 289213920. Its totient is φ = 130146192.

The previous prime is 206064857. The next prime is 206064863. The reversal of 206064861 is 168460602.

It is a happy number.

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

It is not a de Polignac number, because 206064861 - 2² = 206064857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206064863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1807530 + ... + 1807643.

It is an arithmetic number, because the mean of its divisors is an integer number (36151740).

Almost surely, 2^206064861 is an apocalyptic number.

It is an amenable number.

206064861 is a deficient number, since it is larger than the sum of its proper divisors (83149059).

206064861 is a wasteful number, since it uses less digits than its factorization.

206064861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615195.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 206064861 is about 14354.9594565781. The cubic root of 206064861 is about 590.6560365203.

The spelling of 206064861 in words is "two hundred six million, sixty-four thousand, eight hundred sixty-one".