491369 has 4 divisors (see below), whose sum is σ = 496980. Its totient is φ = 485760.

The previous prime is 491357. The next prime is 491371. The reversal of 491369 is 963194.

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

It can be written as a sum of positive squares in 2 ways, for example, as 115600 + 375769 = 340^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 491369 - 2⁴ = 491353 is a prime.

It is a super-2 number, since 2×491369² = 482886988322, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491369.

It is not an unprimeable number, because it can be changed into a prime (491329) 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, 2672 + ... + 2849.

It is an arithmetic number, because the mean of its divisors is an integer number (124245).

2⁴⁹¹³⁶⁹ is an apocalyptic number.

It is an amenable number.

491369 is a deficient number, since it is larger than the sum of its proper divisors (5611).

491369 is an equidigital number, since it uses as much as digits as its factorization.

491369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610.

The product of its digits is 5832, while the sum is 32.

The square root of 491369 is about 700.9771750920. The cubic root of 491369 is about 78.9107039965.

Adding to 491369 its sum of digits (32), we get a square (491401 = 701²).

It can be divided in two parts, 49 and 1369, that multiplied together give a square (67081 = 259²).

The spelling of 491369 in words is "four hundred ninety-one thousand, three hundred sixty-nine".