505656607 has 2 divisors, whose sum is σ = 505656608. Its totient is φ = 505656606.

The previous prime is 505656583. The next prime is 505656611. The reversal of 505656607 is 706656505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505656607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505656607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505651607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252828303 + 252828304.

It is an arithmetic number, because the mean of its divisors is an integer number (252828304).

Almost surely, 2^505656607 is an apocalyptic number.

505656607 is a deficient number, since it is larger than the sum of its proper divisors (1).

505656607 is an equidigital number, since it uses as much as digits as its factorization.

505656607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 505656607 is about 22486.8096225321. The cubic root of 505656607 is about 796.6824104971.

The spelling of 505656607 in words is "five hundred five million, six hundred fifty-six thousand, six hundred seven".