2509305489 has 6 divisors (see below), whose sum is σ = 3624552386. Its totient is φ = 1672870320.

The previous prime is 2509305481. The next prime is 2509305499. The reversal of 2509305489 is 9845039052.

It can be written as a sum of positive squares in only one way, i.e., 2131391889 + 377913600 = 46167^2 + 19440^2 .

It is not a de Polignac number, because 2509305489 - 2³ = 2509305481 is a prime.

It is a super-2 number, since 2×2509305489² = 12593228074251058242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2509305481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139405852 + ... + 139405869.

Almost surely, 2^2509305489 is an apocalyptic number.

It is an amenable number.

2509305489 is a deficient number, since it is larger than the sum of its proper divisors (1115246897).

2509305489 is a wasteful number, since it uses less digits than its factorization.

2509305489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278811727 (or 278811724 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 2509305489 is about 50092.9684586569. The cubic root of 2509305489 is about 1358.8906555170.

The spelling of 2509305489 in words is "two billion, five hundred nine million, three hundred five thousand, four hundred eighty-nine".