489624649 has 2 divisors, whose sum is σ = 489624650. Its totient is φ = 489624648.

The previous prime is 489624647. The next prime is 489624659. The reversal of 489624649 is 946426984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284934400 + 204690249 = 16880^2 + 14307^2 .

It is a cyclic number.

It is not a de Polignac number, because 489624649 - 2¹ = 489624647 is a prime.

Together with 489624647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 489624596 and 489624605.

It is not a weakly prime, because it can be changed into another prime (489624647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244812324 + 244812325.

It is an arithmetic number, because the mean of its divisors is an integer number (244812325).

Almost surely, 2^489624649 is an apocalyptic number.

It is an amenable number.

489624649 is a deficient number, since it is larger than the sum of its proper divisors (1).

489624649 is an equidigital number, since it uses as much as digits as its factorization.

489624649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 52.

The square root of 489624649 is about 22127.4636820400. The cubic root of 489624649 is about 788.1721609503.

The spelling of 489624649 in words is "four hundred eighty-nine million, six hundred twenty-four thousand, six hundred forty-nine".