206893939 has 16 divisors (see below), whose sum is σ = 240096960. Its totient is φ = 174620160.

The previous prime is 206893909. The next prime is 206893949. The reversal of 206893939 is 939398602.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206893939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206893892 and 206893901.

It is not an unprimeable number, because it can be changed into a prime (206893909) 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, 194469 + ... + 195529.

It is an arithmetic number, because the mean of its divisors is an integer number (15006060).

Almost surely, 2^206893939 is an apocalyptic number.

206893939 is a deficient number, since it is larger than the sum of its proper divisors (33203021).

206893939 is a wasteful number, since it uses less digits than its factorization.

206893939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 206893939 is about 14383.8082231376. The cubic root of 206893939 is about 591.4471218075.

The spelling of 206893939 in words is "two hundred six million, eight hundred ninety-three thousand, nine hundred thirty-nine".