491729 has 8 divisors (see below), whose sum is σ = 566400. Its totient is φ = 418176.

The previous prime is 491719. The next prime is 491731. The reversal of 491729 is 927194.

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 491729 - 2¹⁶ = 426193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491695 and 491704.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491729.

It is not an unprimeable number, because it can be changed into a prime (491719) 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, 1217 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (70800).

2⁴⁹¹⁷²⁹ is an apocalyptic number.

It is an amenable number.

491729 is a deficient number, since it is larger than the sum of its proper divisors (74671).

491729 is a wasteful number, since it uses less digits than its factorization.

491729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559.

The product of its digits is 4536, while the sum is 32.

The square root of 491729 is about 701.2339124714. The cubic root of 491729 is about 78.9299705210.

The spelling of 491729 in words is "four hundred ninety-one thousand, seven hundred twenty-nine".