205238029 has 4 divisors (see below), whose sum is σ = 205266880. Its totient is φ = 205209180.

The previous prime is 205238023. The next prime is 205238041. The reversal of 205238029 is 920832502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 205238029 - 2³ = 205238021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205238021) 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, 4684 + ... + 20794.

It is an arithmetic number, because the mean of its divisors is an integer number (51316720).

Almost surely, 2^205238029 is an apocalyptic number.

It is an amenable number.

205238029 is a deficient number, since it is larger than the sum of its proper divisors (28851).

205238029 is a wasteful number, since it uses less digits than its factorization.

205238029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28850.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 205238029 is about 14326.1309850217. The cubic root of 205238029 is about 589.8649781996.

The spelling of 205238029 in words is "two hundred five million, two hundred thirty-eight thousand, twenty-nine".