2689249517 has 2 divisors, whose sum is σ = 2689249518. Its totient is φ = 2689249516.

The previous prime is 2689249513. The next prime is 2689249579. The reversal of 2689249517 is 7159429862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2215490761 + 473758756 = 47069^2 + 21766^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689249517 - 2² = 2689249513 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2689249513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344624758 + 1344624759.

It is an arithmetic number, because the mean of its divisors is an integer number (1344624759).

Almost surely, 2^2689249517 is an apocalyptic number.

It is an amenable number.

2689249517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689249517 is an equidigital number, since it uses as much as digits as its factorization.

2689249517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 2689249517 is about 51857.9744783770. The cubic root of 2689249517 is about 1390.6260687461.

The spelling of 2689249517 in words is "two billion, six hundred eighty-nine million, two hundred forty-nine thousand, five hundred seventeen".