205973709 has 16 divisors (see below), whose sum is σ = 288939840. Its totient is φ = 130343040.

The previous prime is 205973707. The next prime is 205973711. The reversal of 205973709 is 907379502.

205973709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (205973707) and next prime (205973711).

It is not a de Polignac number, because 205973709 - 2¹ = 205973707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205973701) 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, 18079 + ... + 27180.

It is an arithmetic number, because the mean of its divisors is an integer number (18058740).

Almost surely, 2^205973709 is an apocalyptic number.

It is an amenable number.

205973709 is a deficient number, since it is larger than the sum of its proper divisors (82966131).

205973709 is a wasteful number, since it uses less digits than its factorization.

205973709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45340.

The product of its (nonzero) digits is 119070, while the sum is 42.

The square root of 205973709 is about 14351.7841747986. The cubic root of 205973709 is about 590.5689321990.

The spelling of 205973709 in words is "two hundred five million, nine hundred seventy-three thousand, seven hundred nine".