491945946 has 8 divisors (see below), whose sum is σ = 983891904. Its totient is φ = 163981980.

The previous prime is 491945941. The next prime is 491945963. The reversal of 491945946 is 649549194.

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

491945946 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (491945941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40995490 + ... + 40995501.

It is an arithmetic number, because the mean of its divisors is an integer number (122986488).

Almost surely, 2^491945946 is an apocalyptic number.

491945946 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

491945946 is a wasteful number, since it uses less digits than its factorization.

491945946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81990996.

The product of its digits is 1399680, while the sum is 51.

The square root of 491945946 is about 22179.8545080891. The cubic root of 491945946 is about 789.4157652335.

The spelling of 491945946 in words is "four hundred ninety-one million, nine hundred forty-five thousand, nine hundred forty-six".