4493781 has 6 divisors (see below), whose sum is σ = 6491030. Its totient is φ = 2995848.

The previous prime is 4493779. The next prime is 4493789. The reversal of 4493781 is 1873944.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3837681 + 656100 = 1959^2 + 810^2 .

It is not a de Polignac number, because 4493781 - 2¹ = 4493779 is a prime.

It is a super-2 number, since 2×4493781² = 40388135351922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4493789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249646 + ... + 249663.

Almost surely, 2^4493781 is an apocalyptic number.

It is an amenable number.

4493781 is a deficient number, since it is larger than the sum of its proper divisors (1997249).

4493781 is a wasteful number, since it uses less digits than its factorization.

4493781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499315 (or 499312 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 4493781 is about 2119.8540044069. The cubic root of 4493781 is about 165.0202729911.

The spelling of 4493781 in words is "four million, four hundred ninety-three thousand, seven hundred eighty-one".