491373 has 8 divisors (see below), whose sum is σ = 728000. Its totient is φ = 327564.

The previous prime is 491371. The next prime is 491377. The reversal of 491373 is 373194.

It is not a de Polignac number, because 491373 - 2¹ = 491371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 18199 = 491373 / (4 + 9 + 1 + 3 + 7 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491371) 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, 9073 + ... + 9126.

It is an arithmetic number, because the mean of its divisors is an integer number (91000).

2⁴⁹¹³⁷³ is an apocalyptic number.

It is an amenable number.

491373 is a deficient number, since it is larger than the sum of its proper divisors (236627).

491373 is a wasteful number, since it uses less digits than its factorization.

491373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18208 (or 18202 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 491373 is about 700.9800282462. The cubic root of 491373 is about 78.9109181207.

The spelling of 491373 in words is "four hundred ninety-one thousand, three hundred seventy-three".