491849 has 4 divisors (see below), whose sum is σ = 495300. Its totient is φ = 488400.

The previous prime is 491837. The next prime is 491851. The reversal of 491849 is 948194.

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 78400 + 413449 = 280^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 491849 - 2⁴ = 491833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (491819) 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, 1502 + ... + 1799.

It is an arithmetic number, because the mean of its divisors is an integer number (123825).

2⁴⁹¹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

491849 is a deficient number, since it is larger than the sum of its proper divisors (3451).

491849 is a wasteful number, since it uses less digits than its factorization.

491849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450.

The product of its digits is 10368, while the sum is 35.

The square root of 491849 is about 701.3194707122. The cubic root of 491849 is about 78.9363906061.

It can be divided in two parts, 49 and 1849, that multiplied together give a square (90601 = 301²).

The spelling of 491849 in words is "four hundred ninety-one thousand, eight hundred forty-nine".