501645393 has 20 divisors (see below), whose sum is σ = 775215540. Its totient is φ = 322896672.

The previous prime is 501645383. The next prime is 501645427. The reversal of 501645393 is 393546105.

501645393 is a `hidden beast` number, since 5 + 0 + 1 + 645 + 3 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 320123664 + 181521729 = 17892^2 + 13473^2 .

It is not a de Polignac number, because 501645393 - 2¹² = 501641297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (501645343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 104430 + ... + 109127.

It is an arithmetic number, because the mean of its divisors is an integer number (38760777).

Almost surely, 2^501645393 is an apocalyptic number.

It is an amenable number.

501645393 is a deficient number, since it is larger than the sum of its proper divisors (273570147).

501645393 is a wasteful number, since it uses less digits than its factorization.

501645393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213598 (or 213589 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 501645393 is about 22397.4416619399. The cubic root of 501645393 is about 794.5702055638.

The spelling of 501645393 in words is "five hundred one million, six hundred forty-five thousand, three hundred ninety-three".