205940429 has 4 divisors (see below), whose sum is σ = 206416476. Its totient is φ = 205464384.

The previous prime is 205940407. The next prime is 205940447. The reversal of 205940429 is 924049502.

205940429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31753225 + 174187204 = 5635^2 + 13198^2 .

It is a cyclic number.

It is not a de Polignac number, because 205940429 - 2²⁴ = 189163213 is a prime.

It is a super-2 number, since 2×205940429² = 84822920593408082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205940489) 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, 237374 + ... + 238239.

It is an arithmetic number, because the mean of its divisors is an integer number (51604119).

Almost surely, 2^205940429 is an apocalyptic number.

It is an amenable number.

205940429 is a deficient number, since it is larger than the sum of its proper divisors (476047).

205940429 is an equidigital number, since it uses as much as digits as its factorization.

205940429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476046.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 205940429 is about 14350.6246902356. The cubic root of 205940429 is about 590.5371236205.

The spelling of 205940429 in words is "two hundred five million, nine hundred forty thousand, four hundred twenty-nine".