489581551 has 2 divisors, whose sum is σ = 489581552. Its totient is φ = 489581550.

The previous prime is 489581537. The next prime is 489581593. The reversal of 489581551 is 155185984.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 489581551 - 2¹⁹ = 489057263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489581251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244790775 + 244790776.

It is an arithmetic number, because the mean of its divisors is an integer number (244790776).

Almost surely, 2^489581551 is an apocalyptic number.

489581551 is a deficient number, since it is larger than the sum of its proper divisors (1).

489581551 is an equidigital number, since it uses as much as digits as its factorization.

489581551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288000, while the sum is 46.

The square root of 489581551 is about 22126.4898029489. The cubic root of 489581551 is about 788.1490346360.

The spelling of 489581551 in words is "four hundred eighty-nine million, five hundred eighty-one thousand, five hundred fifty-one".