205880029 has 4 divisors (see below), whose sum is σ = 216715840. Its totient is φ = 195044220.

The previous prime is 205879997. The next prime is 205880041. The reversal of 205880029 is 920088502.

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.

It is a cyclic number.

It is not a de Polignac number, because 205880029 - 2⁵ = 205879997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205879976 and 205880003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205880329) 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, 5417877 + ... + 5417914.

It is an arithmetic number, because the mean of its divisors is an integer number (54178960).

Almost surely, 2^205880029 is an apocalyptic number.

It is an amenable number.

205880029 is a deficient number, since it is larger than the sum of its proper divisors (10835811).

205880029 is a wasteful number, since it uses less digits than its factorization.

205880029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10835810.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 205880029 is about 14348.5200979056. The cubic root of 205880029 is about 590.4793853544.

The spelling of 205880029 in words is "two hundred five million, eight hundred eighty thousand, twenty-nine".