4919643 has 8 divisors (see below), whose sum is σ = 7288400. Its totient is φ = 3279744.

The previous prime is 4919639. The next prime is 4919657. The reversal of 4919643 is 3469194.

4919643 is a `hidden beast` number, since 4 + 9 + 1 + 9 + 643 = 666.

It is not a de Polignac number, because 4919643 - 2² = 4919639 is a prime.

It is a Duffinian number.

4919643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4919598 and 4919607.

It is not an unprimeable number, because it can be changed into a prime (4919623) 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 in 7 ways as a sum of consecutive naturals, for example, 91078 + ... + 91131.

It is an arithmetic number, because the mean of its divisors is an integer number (911050).

Almost surely, 2^4919643 is an apocalyptic number.

4919643 is a deficient number, since it is larger than the sum of its proper divisors (2368757).

4919643 is a wasteful number, since it uses less digits than its factorization.

4919643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182218 (or 182212 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 4919643 is about 2218.0268258071. The cubic root of 4919643 is about 170.0765860229.

The spelling of 4919643 in words is "four million, nine hundred nineteen thousand, six hundred forty-three".