491063 has 4 divisors (see below), whose sum is σ = 492480. Its totient is φ = 489648.

The previous prime is 491059. The next prime is 491081. The reversal of 491063 is 360194.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 360194 = 2 ⋅180097.

It is a cyclic number.

It is not a de Polignac number, because 491063 - 2² = 491059 is a prime.

It is a super-2 number, since 2×491063² = 482285739938, which contains 22 as substring.

It is a deceptive number, since it divides R₄₉₁₀₆₂.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491003) 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, 203 + ... + 1011.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2⁴⁹¹⁰⁶³ is an apocalyptic number.

491063 is a deficient number, since it is larger than the sum of its proper divisors (1417).

491063 is an equidigital number, since it uses as much as digits as its factorization.

491063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 491063 is about 700.7588743641. The cubic root of 491063 is about 78.8943200505.

The spelling of 491063 in words is "four hundred ninety-one thousand, sixty-three".