206961005 has 16 divisors (see below), whose sum is σ = 252673344. Its totient is φ = 162714240.

The previous prime is 206960981. The next prime is 206961067. The reversal of 206961005 is 500169602.

It is not a de Polignac number, because 206961005 - 2¹² = 206956909 is a prime.

It is a super-2 number, since 2×206961005² = 85665715181220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 68609 + ... + 71561.

It is an arithmetic number, because the mean of its divisors is an integer number (15792084).

Almost surely, 2^206961005 is an apocalyptic number.

It is an amenable number.

206961005 is a deficient number, since it is larger than the sum of its proper divisors (45712339).

206961005 is a wasteful number, since it uses less digits than its factorization.

206961005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 206961005 is about 14386.1393361805. The cubic root of 206961005 is about 591.5110220320.

The spelling of 206961005 in words is "two hundred six million, nine hundred sixty-one thousand, five".