491585027 has 2 divisors, whose sum is σ = 491585028. Its totient is φ = 491585026.

The previous prime is 491585023. The next prime is 491585033. The reversal of 491585027 is 720585194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491585027 - 2² = 491585023 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491585021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245792513 + 245792514.

It is an arithmetic number, because the mean of its divisors is an integer number (245792514).

Almost surely, 2^491585027 is an apocalyptic number.

491585027 is a deficient number, since it is larger than the sum of its proper divisors (1).

491585027 is an equidigital number, since it uses as much as digits as its factorization.

491585027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 491585027 is about 22171.7168257219. The cubic root of 491585027 is about 789.2226648493. Note that the first 3 decimals are identical.

The spelling of 491585027 in words is "four hundred ninety-one million, five hundred eighty-five thousand, twenty-seven".