205969369 has 6 divisors (see below), whose sum is σ = 210447194. Its totient is φ = 201584880.

The previous prime is 205969303. The next prime is 205969411. The reversal of 205969369 is 963969502.

It can be written as a sum of positive squares in only one way, i.e., 193543744 + 12425625 = 13912^2 + 3525^2 .

It is not a de Polignac number, because 205969369 - 2⁹ = 205968857 is a prime.

It is a super-2 number, since 2×205969369² = 84846761932516322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205960369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44412 + ... + 48829.

Almost surely, 2^205969369 is an apocalyptic number.

It is an amenable number.

205969369 is a deficient number, since it is larger than the sum of its proper divisors (4477825).

205969369 is an frugal number, since it uses more digits than its factorization.

205969369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93335 (or 93288 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 49.

The square root of 205969369 is about 14351.6329732891. The cubic root of 205969369 is about 590.5647842794.

The spelling of 205969369 in words is "two hundred five million, nine hundred sixty-nine thousand, three hundred sixty-nine".