205740929 has 2 divisors, whose sum is σ = 205740930. Its totient is φ = 205740928.

The previous prime is 205740923. The next prime is 205740961. The reversal of 205740929 is 929047502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128300929 + 77440000 = 11327^2 + 8800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205740929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205740892 and 205740901.

It is not a weakly prime, because it can be changed into another prime (205740923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102870464 + 102870465.

It is an arithmetic number, because the mean of its divisors is an integer number (102870465).

Almost surely, 2^205740929 is an apocalyptic number.

It is an amenable number.

205740929 is a deficient number, since it is larger than the sum of its proper divisors (1).

205740929 is an equidigital number, since it uses as much as digits as its factorization.

205740929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 205740929 is about 14343.6720891130. The cubic root of 205740929 is about 590.3463723115.

The spelling of 205740929 in words is "two hundred five million, seven hundred forty thousand, nine hundred twenty-nine".