491679 has 6 divisors (see below), whose sum is σ = 710216. Its totient is φ = 327780.

The previous prime is 491677. The next prime is 491707. The reversal of 491679 is 976194.

It is not a de Polignac number, because 491679 - 2¹ = 491677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491677) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27307 + ... + 27324.

2⁴⁹¹⁶⁷⁹ is an apocalyptic number.

491679 is a deficient number, since it is larger than the sum of its proper divisors (218537).

491679 is a wasteful number, since it uses less digits than its factorization.

491679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54637 (or 54634 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 491679 is about 701.1982601233. The cubic root of 491679 is about 78.9272951773.

It can be divided in two parts, 49 and 1679, that added together give a cube (1728 = 12³).

The spelling of 491679 in words is "four hundred ninety-one thousand, six hundred seventy-nine".