206399677 has 8 divisors (see below), whose sum is σ = 234953280. Its totient is φ = 179477760.

The previous prime is 206399639. The next prime is 206399693. The reversal of 206399677 is 776993602.

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

It is a de Polignac number, because none of the positive numbers 2^k-206399677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206399677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206394677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407652 + ... + 408157.

It is an arithmetic number, because the mean of its divisors is an integer number (29369160).

Almost surely, 2^206399677 is an apocalyptic number.

It is an amenable number.

206399677 is a deficient number, since it is larger than the sum of its proper divisors (28553603).

206399677 is a wasteful number, since it uses less digits than its factorization.

206399677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815843.

The product of its (nonzero) digits is 857304, while the sum is 49.

The square root of 206399677 is about 14366.6167555204. The cubic root of 206399677 is about 590.9757644596.

The spelling of 206399677 in words is "two hundred six million, three hundred ninety-nine thousand, six hundred seventy-seven".