205825489 has 4 divisors (see below), whose sum is σ = 206005156. Its totient is φ = 205645824.

The previous prime is 205825483. The next prime is 205825493. The reversal of 205825489 is 984528502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 174689089 + 31136400 = 13217^2 + 5580^2 .

It is a cyclic number.

It is not a de Polignac number, because 205825489 - 2¹¹ = 205823441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205825483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88104 + ... + 90409.

It is an arithmetic number, because the mean of its divisors is an integer number (51501289).

Almost surely, 2^205825489 is an apocalyptic number.

It is an amenable number.

205825489 is a deficient number, since it is larger than the sum of its proper divisors (179667).

205825489 is a wasteful number, since it uses less digits than its factorization.

205825489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179666.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 205825489 is about 14346.6194275864. The cubic root of 205825489 is about 590.4272391440.

The spelling of 205825489 in words is "two hundred five million, eight hundred twenty-five thousand, four hundred eighty-nine".