491045827 has 2 divisors, whose sum is σ = 491045828. Its totient is φ = 491045826.

The previous prime is 491045783. The next prime is 491045831. The reversal of 491045827 is 728540194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491045827 - 2²⁷ = 356828099 is a prime.

It is a super-2 number, since 2×491045827² = 482252008428227858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491045827.

It is not a weakly prime, because it can be changed into another prime (491045887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245522913 + 245522914.

It is an arithmetic number, because the mean of its divisors is an integer number (245522914).

Almost surely, 2^491045827 is an apocalyptic number.

491045827 is a deficient number, since it is larger than the sum of its proper divisors (1).

491045827 is an equidigital number, since it uses as much as digits as its factorization.

491045827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 491045827 is about 22159.5538538121. The cubic root of 491045827 is about 788.9340036672.

The spelling of 491045827 in words is "four hundred ninety-one million, forty-five thousand, eight hundred twenty-seven".