2689148449 has 9 divisors (see below), whose sum is σ = 2912648313. Its totient is φ = 2481668592.

The previous prime is 2689148443. The next prime is 2689148459. The reversal of 2689148449 is 9448419862.

It is a happy number.

The square root of 2689148449 is 51857.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 445421025 + 2243727424 = 21105^2 + 47368^2 .

It is not a de Polignac number, because 2689148449 - 2¹¹ = 2689146401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2689148449.

It is not an unprimeable number, because it can be changed into a prime (2689148443) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 672147 + ... + 676135.

Almost surely, 2^2689148449 is an apocalyptic number.

2689148449 is the 51857-th square number.

2689148449 is the 25929-th centered octagonal number.

It is an amenable number.

2689148449 is a deficient number, since it is larger than the sum of its proper divisors (223499864).

2689148449 is an frugal number, since it uses more digits than its factorization.

2689148449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8004 (or 4002 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 55.

The cubic root of 2689148449 is about 1390.6086475838.

The spelling of 2689148449 in words is "two billion, six hundred eighty-nine million, one hundred forty-eight thousand, four hundred forty-nine".