4493681 has 4 divisors (see below), whose sum is σ = 4503972. Its totient is φ = 4483392.

The previous prime is 4493663. The next prime is 4493689. The reversal of 4493681 is 1863944.

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 3182656 + 1311025 = 1784^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 4493681 - 2¹⁸ = 4231537 is a prime.

It is a super-2 number, since 2×4493681² = 40386337859522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4493689) 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, 4460 + ... + 5373.

It is an arithmetic number, because the mean of its divisors is an integer number (1125993).

Almost surely, 2^4493681 is an apocalyptic number.

It is an amenable number.

4493681 is a deficient number, since it is larger than the sum of its proper divisors (10291).

4493681 is an equidigital number, since it uses as much as digits as its factorization.

4493681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10290.

The product of its digits is 20736, while the sum is 35.

The square root of 4493681 is about 2119.8304177457. The cubic root of 4493681 is about 165.0190489180.

The spelling of 4493681 in words is "four million, four hundred ninety-three thousand, six hundred eighty-one".