1648133489 has 2 divisors, whose sum is σ = 1648133490. Its totient is φ = 1648133488.

The previous prime is 1648133413. The next prime is 1648133581. The reversal of 1648133489 is 9843318461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1586667889 + 61465600 = 39833^2 + 7840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648133489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1648133089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824066744 + 824066745.

It is an arithmetic number, because the mean of its divisors is an integer number (824066745).

Almost surely, 2^1648133489 is an apocalyptic number.

It is an amenable number.

1648133489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648133489 is an equidigital number, since it uses as much as digits as its factorization.

1648133489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 47.

The square root of 1648133489 is about 40597.2103598264. The cubic root of 1648133489 is about 1181.2200081819.

The spelling of 1648133489 in words is "one billion, six hundred forty-eight million, one hundred thirty-three thousand, four hundred eighty-nine".