505626643 has 2 divisors, whose sum is σ = 505626644. Its totient is φ = 505626642.

The previous prime is 505626619. The next prime is 505626661. The reversal of 505626643 is 346626505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505626643 is a prime.

It is a super-2 number, since 2×505626643² = 511316604222898898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505626343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252813321 + 252813322.

It is an arithmetic number, because the mean of its divisors is an integer number (252813322).

Almost surely, 2^505626643 is an apocalyptic number.

505626643 is a deficient number, since it is larger than the sum of its proper divisors (1).

505626643 is an equidigital number, since it uses as much as digits as its factorization.

505626643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 505626643 is about 22486.1433554089. The cubic root of 505626643 is about 796.6666736888. Note that the first 4 decimals are identical.

The spelling of 505626643 in words is "five hundred five million, six hundred twenty-six thousand, six hundred forty-three".