2489664409 has 2 divisors, whose sum is σ = 2489664410. Its totient is φ = 2489664408.

The previous prime is 2489664407. The next prime is 2489664451. The reversal of 2489664409 is 9044669842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1883126025 + 606538384 = 43395^2 + 24628^2 .

It is a cyclic number.

It is not a de Polignac number, because 2489664409 - 2¹ = 2489664407 is a prime.

Together with 2489664407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2489664403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244832204 + 1244832205.

It is an arithmetic number, because the mean of its divisors is an integer number (1244832205).

Almost surely, 2^2489664409 is an apocalyptic number.

It is an amenable number.

2489664409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489664409 is an equidigital number, since it uses as much as digits as its factorization.

2489664409 is an evil number, because the sum of its binary digits is even.

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

The square root of 2489664409 is about 49896.5370441677. The cubic root of 2489664409 is about 1355.3358841984.

The spelling of 2489664409 in words is "two billion, four hundred eighty-nine million, six hundred sixty-four thousand, four hundred nine".