206972305 has 8 divisors (see below), whose sum is σ = 254424744. Its totient is φ = 161539200.

The previous prime is 206972303. The next prime is 206972317. The reversal of 206972305 is 503279602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24641296 + 182331009 = 4964^2 + 13503^2 .

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

It is not a de Polignac number, because 206972305 - 2¹ = 206972303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206972303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504606 + ... + 505015.

It is an arithmetic number, because the mean of its divisors is an integer number (31803093).

Almost surely, 2^206972305 is an apocalyptic number.

It is an amenable number.

206972305 is a deficient number, since it is larger than the sum of its proper divisors (47452439).

206972305 is a wasteful number, since it uses less digits than its factorization.

206972305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009667.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 206972305 is about 14386.5320699604. The cubic root of 206972305 is about 591.5217872692.

The spelling of 206972305 in words is "two hundred six million, nine hundred seventy-two thousand, three hundred five".