205347970 has 16 divisors (see below), whose sum is σ = 376601400. Its totient is φ = 80589184.

The previous prime is 205347959. The next prime is 205347973. The reversal of 205347970 is 79743502.

It can be written as a sum of positive squares in 4 ways, for example, as 137334961 + 68013009 = 11719^2 + 8247^2 .

It is not an unprimeable number, because it can be changed into a prime (205347973) 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, 193195 + ... + 194254.

Almost surely, 2^205347970 is an apocalyptic number.

205347970 is a deficient number, since it is larger than the sum of its proper divisors (171253430).

205347970 is a wasteful number, since it uses less digits than its factorization.

205347970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387509.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 205347970 is about 14329.9675505564. The cubic root of 205347970 is about 589.9702848196.

The spelling of 205347970 in words is "two hundred five million, three hundred forty-seven thousand, nine hundred seventy".