205320993 has 8 divisors (see below), whose sum is σ = 278926848. Its totient is φ = 134297904.

The previous prime is 205320961. The next prime is 205321013. The reversal of 205320993 is 399023502.

205320993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 205320993 - 2⁵ = 205320961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205320923) 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, 645505 + ... + 645822.

It is an arithmetic number, because the mean of its divisors is an integer number (34865856).

Almost surely, 2^205320993 is an apocalyptic number.

It is an amenable number.

205320993 is a deficient number, since it is larger than the sum of its proper divisors (73605855).

205320993 is a wasteful number, since it uses less digits than its factorization.

205320993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291383.

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 205320993 is about 14329.0262404673. The cubic root of 205320993 is about 589.9444484707.

The spelling of 205320993 in words is "two hundred five million, three hundred twenty thousand, nine hundred ninety-three".