491929 has 8 divisors (see below), whose sum is σ = 548640. Its totient is φ = 438336.

The previous prime is 491923. The next prime is 491951. The reversal of 491929 is 929194.

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 491929 - 2⁹ = 491417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491894 and 491903.

It is not an unprimeable number, because it can be changed into a prime (491923) 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, 439 + ... + 1084.

It is an arithmetic number, because the mean of its divisors is an integer number (68580).

2⁴⁹¹⁹²⁹ is an apocalyptic number.

It is an amenable number.

491929 is a deficient number, since it is larger than the sum of its proper divisors (56711).

491929 is a wasteful number, since it uses less digits than its factorization.

491929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its digits is 5832, while the sum is 34.

The square root of 491929 is about 701.3765037410. The cubic root of 491929 is about 78.9406700828.

The spelling of 491929 in words is "four hundred ninety-one thousand, nine hundred twenty-nine".