205812069 has 8 divisors (see below), whose sum is σ = 283268352. Its totient is φ = 132781920.

The previous prime is 205812059. The next prime is 205812077. The reversal of 205812069 is 960218502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205812069 - 2⁴ = 205812053 is a prime.

It is a super-2 number, since 2×205812069² = 84717215492121522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205812049) 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, 1106424 + ... + 1106609.

It is an arithmetic number, because the mean of its divisors is an integer number (35408544).

Almost surely, 2^205812069 is an apocalyptic number.

It is an amenable number.

205812069 is a deficient number, since it is larger than the sum of its proper divisors (77456283).

205812069 is a wasteful number, since it uses less digits than its factorization.

205812069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213067.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 205812069 is about 14346.1517139615. The cubic root of 205812069 is about 590.4144067428.

The spelling of 205812069 in words is "two hundred five million, eight hundred twelve thousand, sixty-nine".