491741011 has 2 divisors, whose sum is σ = 491741012. Its totient is φ = 491741010.

The previous prime is 491741009. The next prime is 491741017. The reversal of 491741011 is 110147194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491741011 - 2¹ = 491741009 is a prime.

Together with 491741009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (491741017) 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 as a sum of consecutive naturals, namely, 245870505 + 245870506.

It is an arithmetic number, because the mean of its divisors is an integer number (245870506).

Almost surely, 2^491741011 is an apocalyptic number.

491741011 is a deficient number, since it is larger than the sum of its proper divisors (1).

491741011 is an equidigital number, since it uses as much as digits as its factorization.

491741011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 491741011 is about 22175.2341814016. The cubic root of 491741011 is about 789.3061316508.

The spelling of 491741011 in words is "four hundred ninety-one million, seven hundred forty-one thousand, eleven".