505557653 has 2 divisors, whose sum is σ = 505557654. Its totient is φ = 505557652.

The previous prime is 505557649. The next prime is 505557671. The reversal of 505557653 is 356755505.

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., 503463844 + 2093809 = 22438^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 505557653 - 2² = 505557649 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505557653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505557683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252778826 + 252778827.

It is an arithmetic number, because the mean of its divisors is an integer number (252778827).

Almost surely, 2^505557653 is an apocalyptic number.

It is an amenable number.

505557653 is a deficient number, since it is larger than the sum of its proper divisors (1).

505557653 is an equidigital number, since it uses as much as digits as its factorization.

505557653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393750, while the sum is 41.

The square root of 505557653 is about 22484.6092472162. The cubic root of 505557653 is about 796.6304384320.

The spelling of 505557653 in words is "five hundred five million, five hundred fifty-seven thousand, six hundred fifty-three".