205700983 has 12 divisors (see below), whose sum is σ = 217743120. Its totient is φ = 193932992.

The previous prime is 205700959. The next prime is 205700993. The reversal of 205700983 is 389007502.

It is not a de Polignac number, because 205700983 - 2⁵ = 205700951 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 (205700923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 648741 + ... + 649057.

It is an arithmetic number, because the mean of its divisors is an integer number (18145260).

Almost surely, 2^205700983 is an apocalyptic number.

205700983 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

205700983 is a deficient number, since it is larger than the sum of its proper divisors (12042137).

205700983 is an frugal number, since it uses more digits than its factorization.

205700983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 205700983 is about 14342.2795607951. The cubic root of 205700983 is about 590.3081632514.

The spelling of 205700983 in words is "two hundred five million, seven hundred thousand, nine hundred eighty-three".