493661 has 8 divisors (see below), whose sum is σ = 570240. Its totient is φ = 418608.

The previous prime is 493657. The next prime is 493693. The reversal of 493661 is 166394.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 493661 - 2² = 493657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 493661.

It is not an unprimeable number, because it can be changed into a prime (493621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440 + ... + 1086.

It is an arithmetic number, because the mean of its divisors is an integer number (71280).

2⁴⁹³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

493661 is a deficient number, since it is larger than the sum of its proper divisors (76579).

493661 is a wasteful number, since it uses less digits than its factorization.

493661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its digits is 3888, while the sum is 29.

The square root of 493661 is about 702.6101337157. The cubic root of 493661 is about 79.0332072114.

The spelling of 493661 in words is "four hundred ninety-three thousand, six hundred sixty-one".