491115011 has 2 divisors, whose sum is σ = 491115012. Its totient is φ = 491115010.

The previous prime is 491114993. The next prime is 491115017. The reversal of 491115011 is 110511194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491115011 - 2⁶ = 491114947 is a prime.

It is not a weakly prime, because it can be changed into another prime (491115017) 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 as a sum of consecutive naturals, namely, 245557505 + 245557506.

It is an arithmetic number, because the mean of its divisors is an integer number (245557506).

Almost surely, 2^491115011 is an apocalyptic number.

491115011 is a deficient number, since it is larger than the sum of its proper divisors (1).

491115011 is an equidigital number, since it uses as much as digits as its factorization.

491115011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 23.

The square root of 491115011 is about 22161.1148410905. The cubic root of 491115011 is about 788.9710531943.

The spelling of 491115011 in words is "four hundred ninety-one million, one hundred fifteen thousand, eleven".