491927 has 4 divisors (see below), whose sum is σ = 508920. Its totient is φ = 474936.

The previous prime is 491923. The next prime is 491951. The reversal of 491927 is 729194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491927 - 2² = 491923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491893 and 491902.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 8453 + ... + 8510.

It is an arithmetic number, because the mean of its divisors is an integer number (127230).

2⁴⁹¹⁹²⁷ is an apocalyptic number.

491927 is a deficient number, since it is larger than the sum of its proper divisors (16993).

491927 is a wasteful number, since it uses less digits than its factorization.

491927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16992.

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

The square root of 491927 is about 701.3750779718. The cubic root of 491927 is about 78.9405631015.

The spelling of 491927 in words is "four hundred ninety-one thousand, nine hundred twenty-seven".