206053993 has 8 divisors (see below), whose sum is σ = 223896320. Its totient is φ = 188911440.

The previous prime is 206053973. The next prime is 206053997. The reversal of 206053993 is 399350602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206053993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206053997) 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, 174330 + ... + 175507.

It is an arithmetic number, because the mean of its divisors is an integer number (27987040).

Almost surely, 2^206053993 is an apocalyptic number.

It is an amenable number.

206053993 is a deficient number, since it is larger than the sum of its proper divisors (17842327).

206053993 is a wasteful number, since it uses less digits than its factorization.

206053993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349887.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 206053993 is about 14354.5809064563. The cubic root of 206053993 is about 590.6456524716.

It can be divided in two parts, 206053 and 993, that added together give a triangular number (207046 = T₆₄₃).

The spelling of 206053993 in words is "two hundred six million, fifty-three thousand, nine hundred ninety-three".