491244669 has 28 divisors (see below), whose sum is σ = 746982432. Its totient is φ = 322849800.

The previous prime is 491244661. The next prime is 491244683. The reversal of 491244669 is 966442194.

It is not a de Polignac number, because 491244669 - 2³ = 491244661 is a prime.

It is a super-2 number, since 2×491244669² = 482642649641839122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491244661) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 47014 + ... + 56504.

It is an arithmetic number, because the mean of its divisors is an integer number (26677944).

Almost surely, 2^491244669 is an apocalyptic number.

It is an amenable number.

491244669 is a deficient number, since it is larger than the sum of its proper divisors (255737763).

491244669 is an frugal number, since it uses more digits than its factorization.

491244669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9580 (or 9565 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 491244669 is about 22164.0399972568. The cubic root of 491244669 is about 789.0404784854.

The spelling of 491244669 in words is "four hundred ninety-one million, two hundred forty-four thousand, six hundred sixty-nine".