206069691 has 4 divisors (see below), whose sum is σ = 274759592. Its totient is φ = 137379792.

The previous prime is 206069663. The next prime is 206069693. The reversal of 206069691 is 196960602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206069691 - 2¹¹ = 206067643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206069693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34344946 + ... + 34344951.

It is an arithmetic number, because the mean of its divisors is an integer number (68689898).

Almost surely, 2^206069691 is an apocalyptic number.

206069691 is a deficient number, since it is larger than the sum of its proper divisors (68689901).

206069691 is an equidigital number, since it uses as much as digits as its factorization.

206069691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68689900.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 206069691 is about 14355.1276901322. The cubic root of 206069691 is about 590.6606513235.

The spelling of 206069691 in words is "two hundred six million, sixty-nine thousand, six hundred ninety-one".