493781 has 4 divisors (see below), whose sum is σ = 495552. Its totient is φ = 492012.

The previous prime is 493777. The next prime is 493793. The reversal of 493781 is 187394.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 493781 - 2² = 493777 is a prime.

It is a super-2 number, since 2×493781² = 487639351922, 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 (493711) 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, 365 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (123888).

2⁴⁹³⁷⁸¹ is an apocalyptic number.

It is an amenable number.

493781 is a deficient number, since it is larger than the sum of its proper divisors (1771).

493781 is a wasteful number, since it uses less digits than its factorization.

493781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770.

The product of its digits is 6048, while the sum is 32.

The square root of 493781 is about 702.6955243916. The cubic root of 493781 is about 79.0396105371.

The spelling of 493781 in words is "four hundred ninety-three thousand, seven hundred eighty-one".