2689243057 has 4 divisors (see below), whose sum is σ = 2700495360. Its totient is φ = 2677990756.

The previous prime is 2689243027. The next prime is 2689243079. The reversal of 2689243057 is 7503429862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7503429862 = 2 ⋅3751714931.

It is a cyclic number.

It is not a de Polignac number, because 2689243057 - 2⁷ = 2689242929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2689242998 and 2689243016.

It is not an unprimeable number, because it can be changed into a prime (2689243027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5625793 + ... + 5626270.

It is an arithmetic number, because the mean of its divisors is an integer number (675123840).

Almost surely, 2^2689243057 is an apocalyptic number.

It is an amenable number.

2689243057 is a deficient number, since it is larger than the sum of its proper divisors (11252303).

2689243057 is a wasteful number, since it uses less digits than its factorization.

2689243057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11252302.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 2689243057 is about 51857.9121928371. The cubic root of 2689243057 is about 1390.6249552444.

The spelling of 2689243057 in words is "two billion, six hundred eighty-nine million, two hundred forty-three thousand, fifty-seven".