491930 has 8 divisors (see below), whose sum is σ = 885492. Its totient is φ = 196768.

The previous prime is 491923. The next prime is 491951. The reversal of 491930 is 39194.

It is a happy number.

491930 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 491401 + 529 = 701^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 491930.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24587 + ... + 24606.

2⁴⁹¹⁹³⁰ is an apocalyptic number.

491930 is a deficient number, since it is larger than the sum of its proper divisors (393562).

491930 is a wasteful number, since it uses less digits than its factorization.

491930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49200.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 491930 is about 701.3772166245. The cubic root of 491930 is about 78.9407235733.

The spelling of 491930 in words is "four hundred ninety-one thousand, nine hundred thirty".