209006105 has 16 divisors (see below), whose sum is σ = 312695424. Its totient is φ = 130289280.

The previous prime is 209006029. The next prime is 209006111. The reversal of 209006105 is 501600902.

209006105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209006105 - 2¹⁸ = 208743961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271052 + ... + 271821.

It is an arithmetic number, because the mean of its divisors is an integer number (19543464).

Almost surely, 2^209006105 is an apocalyptic number.

It is an amenable number.

209006105 is a deficient number, since it is larger than the sum of its proper divisors (103689319).

209006105 is a wasteful number, since it uses less digits than its factorization.

209006105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542896.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 209006105 is about 14457.0434390992. The cubic root of 209006105 is about 593.4529922856.

The spelling of 209006105 in words is "two hundred nine million, six thousand, one hundred five".