491490573 has 32 divisors (see below), whose sum is σ = 771873024. Its totient is φ = 272305152.

The previous prime is 491490569. The next prime is 491490581. The reversal of 491490573 is 375094194.

It is not a de Polignac number, because 491490573 - 2² = 491490569 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491490583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260911 + ... + 262787.

It is an arithmetic number, because the mean of its divisors is an integer number (24121032).

Almost surely, 2^491490573 is an apocalyptic number.

It is an amenable number.

491490573 is a deficient number, since it is larger than the sum of its proper divisors (280382451).

491490573 is a wasteful number, since it uses less digits than its factorization.

491490573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261.

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

The square root of 491490573 is about 22169.5866673242. The cubic root of 491490573 is about 789.1721140741.

The spelling of 491490573 in words is "four hundred ninety-one million, four hundred ninety thousand, five hundred seventy-three".