505656583 has 2 divisors, whose sum is σ = 505656584. Its totient is φ = 505656582.

The previous prime is 505656553. The next prime is 505656607. The reversal of 505656583 is 385656505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505656583 - 2²⁵ = 472102151 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505656523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252828291 + 252828292.

It is an arithmetic number, because the mean of its divisors is an integer number (252828292).

Almost surely, 2^505656583 is an apocalyptic number.

505656583 is a deficient number, since it is larger than the sum of its proper divisors (1).

505656583 is an equidigital number, since it uses as much as digits as its factorization.

505656583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540000, while the sum is 43.

The square root of 505656583 is about 22486.8090888859. The cubic root of 505656583 is about 796.6823978928.

The spelling of 505656583 in words is "five hundred five million, six hundred fifty-six thousand, five hundred eighty-three".