206949705 has 16 divisors (see below), whose sum is σ = 331707264. Its totient is φ = 110177280.

The previous prime is 206949697. The next prime is 206949761. The reversal of 206949705 is 507949602.

206949705 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 206949705 - 2³ = 206949697 is a prime.

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, 3301 + ... + 20610.

It is an arithmetic number, because the mean of its divisors is an integer number (20731704).

Almost surely, 2^206949705 is an apocalyptic number.

It is an amenable number.

206949705 is a deficient number, since it is larger than the sum of its proper divisors (124757559).

206949705 is a wasteful number, since it uses less digits than its factorization.

206949705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24496.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 206949705 is about 14385.7465916789. The cubic root of 206949705 is about 591.5002564030.

The spelling of 206949705 in words is "two hundred six million, nine hundred forty-nine thousand, seven hundred five".