206938397 has 4 divisors (see below), whose sum is σ = 206967456. Its totient is φ = 206909340.

The previous prime is 206938393. The next prime is 206938427. The reversal of 206938397 is 793839602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 206938397 - 2² = 206938393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206938393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4208 + ... + 20774.

It is an arithmetic number, because the mean of its divisors is an integer number (51741864).

Almost surely, 2^206938397 is an apocalyptic number.

It is an amenable number.

206938397 is a deficient number, since it is larger than the sum of its proper divisors (29059).

206938397 is a wasteful number, since it uses less digits than its factorization.

206938397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29058.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 206938397 is about 14385.3535583940. The cubic root of 206938397 is about 591.4894827600.

The spelling of 206938397 in words is "two hundred six million, nine hundred thirty-eight thousand, three hundred ninety-seven".