4819681 has 4 divisors (see below), whose sum is σ = 4828612. Its totient is φ = 4810752.

The previous prime is 4819669. The next prime is 4819697. The reversal of 4819681 is 1869184.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4243600 + 576081 = 2060^2 + 759^2 .

It is a cyclic number.

It is not a de Polignac number, because 4819681 - 2⁹ = 4819169 is a prime.

It is a super-2 number, since 2×4819681² = 46458649883522, which contains 22 as substring.

It is a Duffinian number.

4819681 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4819681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4819631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3600 + ... + 4753.

It is an arithmetic number, because the mean of its divisors is an integer number (1207153).

Almost surely, 2^4819681 is an apocalyptic number.

It is an amenable number.

4819681 is a deficient number, since it is larger than the sum of its proper divisors (8931).

4819681 is an equidigital number, since it uses as much as digits as its factorization.

4819681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8930.

The product of its digits is 13824, while the sum is 37.

The square root of 4819681 is about 2195.3771885487. The cubic root of 4819681 is about 168.9167686514.

The spelling of 4819681 in words is "four million, eight hundred nineteen thousand, six hundred eighty-one".