489091571 has 2 divisors, whose sum is σ = 489091572. Its totient is φ = 489091570.

The previous prime is 489091553. The next prime is 489091613. The reversal of 489091571 is 175190984.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 489091571 - 2¹⁸ = 488829427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (489091531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244545785 + 244545786.

It is an arithmetic number, because the mean of its divisors is an integer number (244545786).

Almost surely, 2^489091571 is an apocalyptic number.

489091571 is a deficient number, since it is larger than the sum of its proper divisors (1).

489091571 is an equidigital number, since it uses as much as digits as its factorization.

489091571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 489091571 is about 22115.4147824543. The cubic root of 489091571 is about 787.8860167143.

The spelling of 489091571 in words is "four hundred eighty-nine million, ninety-one thousand, five hundred seventy-one".