501606643 has 2 divisors, whose sum is σ = 501606644. Its totient is φ = 501606642.

The previous prime is 501606619. The next prime is 501606671. The reversal of 501606643 is 346606105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501606643 - 2¹³ = 501598451 is a prime.

It is not a weakly prime, because it can be changed into another prime (501607643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250803321 + 250803322.

It is an arithmetic number, because the mean of its divisors is an integer number (250803322).

Almost surely, 2^501606643 is an apocalyptic number.

501606643 is a deficient number, since it is larger than the sum of its proper divisors (1).

501606643 is an equidigital number, since it uses as much as digits as its factorization.

501606643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 501606643 is about 22396.5765910775. The cubic root of 501606643 is about 794.5497459665.

The spelling of 501606643 in words is "five hundred one million, six hundred six thousand, six hundred forty-three".