491045973 has 8 divisors (see below), whose sum is σ = 714248736. Its totient is φ = 297603600.

The previous prime is 491045963. The next prime is 491045977. The reversal of 491045973 is 379540194.

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

It is not a de Polignac number, because 491045973 - 2¹⁶ = 490980437 is a prime.

It is a super-2 number, since 2×491045973² = 482252295199033458, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491045977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7440058 + ... + 7440123.

It is an arithmetic number, because the mean of its divisors is an integer number (89281092).

Almost surely, 2^491045973 is an apocalyptic number.

It is an amenable number.

491045973 is a deficient number, since it is larger than the sum of its proper divisors (223202763).

491045973 is a wasteful number, since it uses less digits than its factorization.

491045973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14880195.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 491045973 is about 22159.5571481020. The cubic root of 491045973 is about 788.9340818570.

The spelling of 491045973 in words is "four hundred ninety-one million, forty-five thousand, nine hundred seventy-three".