205945907 has 8 divisors (see below), whose sum is σ = 213207600. Its totient is φ = 198694944.

The previous prime is 205945897. The next prime is 205945919. The reversal of 205945907 is 709549502.

205945907 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 a cyclic number.

It is not a de Polignac number, because 205945907 - 2⁶ = 205945843 is a prime.

It is a super-2 number, since 2×205945907² = 84827433220105298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205945007) 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, 72233 + ... + 75029.

It is an arithmetic number, because the mean of its divisors is an integer number (26650950).

Almost surely, 2^205945907 is an apocalyptic number.

205945907 is a deficient number, since it is larger than the sum of its proper divisors (7261693).

205945907 is a wasteful number, since it uses less digits than its factorization.

205945907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5365.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 205945907 is about 14350.8155517378. The cubic root of 205945907 is about 590.5423596552.

The spelling of 205945907 in words is "two hundred five million, nine hundred forty-five thousand, nine hundred seven".