489240581 has 2 divisors, whose sum is σ = 489240582. Its totient is φ = 489240580.

The previous prime is 489240571. The next prime is 489240593. The reversal of 489240581 is 185042984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 484440100 + 4800481 = 22010^2 + 2191^2 .

It is a cyclic number.

It is not a de Polignac number, because 489240581 - 2⁶ = 489240517 is a prime.

It is a super-2 number, since 2×489240581² = 478712692194435122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489240511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244620290 + 244620291.

It is an arithmetic number, because the mean of its divisors is an integer number (244620291).

Almost surely, 2^489240581 is an apocalyptic number.

It is an amenable number.

489240581 is a deficient number, since it is larger than the sum of its proper divisors (1).

489240581 is an equidigital number, since it uses as much as digits as its factorization.

489240581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 489240581 is about 22118.7834430377. The cubic root of 489240581 is about 787.9660228464.

The spelling of 489240581 in words is "four hundred eighty-nine million, two hundred forty thousand, five hundred eighty-one".