491306011 has 16 divisors (see below), whose sum is σ = 582658048. Its totient is φ = 405388800.

The previous prime is 491305979. The next prime is 491306027. The reversal of 491306011 is 110603194.

It is a cyclic number.

It is not a de Polignac number, because 491306011 - 2⁵ = 491305979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491306051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36016 + ... + 47746.

It is an arithmetic number, because the mean of its divisors is an integer number (36416128).

Almost surely, 2^491306011 is an apocalyptic number.

491306011 is a deficient number, since it is larger than the sum of its proper divisors (91352037).

491306011 is a wasteful number, since it uses less digits than its factorization.

491306011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11962.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 491306011 is about 22165.4237721727. The cubic root of 491306011 is about 789.0733197622.

The spelling of 491306011 in words is "four hundred ninety-one million, three hundred six thousand, eleven".