206915090 has 8 divisors (see below), whose sum is σ = 372447180. Its totient is φ = 82766032.

The previous prime is 206915081. The next prime is 206915101. The reversal of 206915090 is 90519602.

It can be written as a sum of positive squares in 2 ways, for example, as 189915961 + 16999129 = 13781^2 + 4123^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10345745 + ... + 10345764.

Almost surely, 2^206915090 is an apocalyptic number.

206915090 is a deficient number, since it is larger than the sum of its proper divisors (165532090).

206915090 is a wasteful number, since it uses less digits than its factorization.

206915090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20691516.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 206915090 is about 14384.5434407909. The cubic root of 206915090 is about 591.4672758888.

The spelling of 206915090 in words is "two hundred six million, nine hundred fifteen thousand, ninety".