505495643 has 2 divisors, whose sum is σ = 505495644. Its totient is φ = 505495642.

The previous prime is 505495567. The next prime is 505495649. The reversal of 505495643 is 346594505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505495643 - 2¹⁸ = 505233499 is a prime.

It is a Chen prime.

It is equal to p_26629664 and since 505495643 and 26629664 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505495643.

It is not a weakly prime, because it can be changed into another prime (505495649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252747821 + 252747822.

It is an arithmetic number, because the mean of its divisors is an integer number (252747822).

Almost surely, 2^505495643 is an apocalyptic number.

505495643 is a deficient number, since it is larger than the sum of its proper divisors (1).

505495643 is an equidigital number, since it uses as much as digits as its factorization.

505495643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 505495643 is about 22483.2302616862. The cubic root of 505495643 is about 796.5978664309.

The spelling of 505495643 in words is "five hundred five million, four hundred ninety-five thousand, six hundred forty-three".