206897669 has 16 divisors (see below), whose sum is σ = 240468480. Its totient is φ = 176027760.

The previous prime is 206897653. The next prime is 206897683. The reversal of 206897669 is 966798602.

It is a cyclic number.

It is not a de Polignac number, because 206897669 - 2⁴ = 206897653 is a prime.

It is a super-2 number, since 2×206897669² = 85613290875267122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 206897669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206897609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11384 + ... + 23310.

It is an arithmetic number, because the mean of its divisors is an integer number (15029280).

Almost surely, 2^206897669 is an apocalyptic number.

It is an amenable number.

206897669 is a deficient number, since it is larger than the sum of its proper divisors (33570811).

206897669 is a wasteful number, since it uses less digits than its factorization.

206897669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12040.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 206897669 is about 14383.9378822352. The cubic root of 206897669 is about 591.4506760997.

The spelling of 206897669 in words is "two hundred six million, eight hundred ninety-seven thousand, six hundred sixty-nine".