491994 has 20 divisors (see below), whose sum is σ = 1102794. Its totient is φ = 163944.

The previous prime is 491983. The next prime is 492007. The reversal of 491994 is 499194.

It can be written as a sum of positive squares in only one way, i.e., 342225 + 149769 = 585^2 + 387^2 .

It is an unprimeable number.

491994 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1357 + ... + 1680.

2⁴⁹¹⁹⁹⁴ is an apocalyptic number.

491994 is an abundant number, since it is smaller than the sum of its proper divisors (610800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491994 is a wasteful number, since it uses less digits than its factorization.

491994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051 (or 3042 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 491994 is about 701.4228396624. The cubic root of 491994 is about 78.9441468159.

It can be divided in two parts, 491 and 994, that added together give a triangular number (1485 = T₅₄).

The spelling of 491994 in words is "four hundred ninety-one thousand, nine hundred ninety-four".