505544129 has 2 divisors, whose sum is σ = 505544130. Its totient is φ = 505544128.

The previous prime is 505544107. The next prime is 505544183. The reversal of 505544129 is 921445505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497290000 + 8254129 = 22300^2 + 2873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505544129 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (505544189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252772064 + 252772065.

It is an arithmetic number, because the mean of its divisors is an integer number (252772065).

Almost surely, 2^505544129 is an apocalyptic number.

It is an amenable number.

505544129 is a deficient number, since it is larger than the sum of its proper divisors (1).

505544129 is an equidigital number, since it uses as much as digits as its factorization.

505544129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 505544129 is about 22484.3085061560. The cubic root of 505544129 is about 796.6233349058.

The spelling of 505544129 in words is "five hundred five million, five hundred forty-four thousand, one hundred twenty-nine".