205890395 has 4 divisors (see below), whose sum is σ = 247068480. Its totient is φ = 164712312.

The previous prime is 205890379. The next prime is 205890431. The reversal of 205890395 is 593098502.

205890395 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 593098502 = 2 ⋅296549251.

It is a cyclic number.

It is not a de Polignac number, because 205890395 - 2⁴ = 205890379 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20589035 + ... + 20589044.

It is an arithmetic number, because the mean of its divisors is an integer number (61767120).

Almost surely, 2^205890395 is an apocalyptic number.

205890395 is a deficient number, since it is larger than the sum of its proper divisors (41178085).

205890395 is an equidigital number, since it uses as much as digits as its factorization.

205890395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41178084.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 205890395 is about 14348.8813152803. The cubic root of 205890395 is about 590.4892953436.

The spelling of 205890395 in words is "two hundred five million, eight hundred ninety thousand, three hundred ninety-five".