4340709521 has 4 divisors (see below), whose sum is σ = 4342750500. Its totient is φ = 4338668544.

The previous prime is 4340709511. The next prime is 4340709557. The reversal of 4340709521 is 1259070434.

4340709521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1259070434 = 2 ⋅629535217.

It can be written as a sum of positive squares in 2 ways, for example, as 408040000 + 3932669521 = 20200^2 + 62711^2 .

It is a cyclic number.

It is not a de Polignac number, because 4340709521 - 2¹⁰ = 4340708497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4340709511) 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, 1017296 + ... + 1021553.

It is an arithmetic number, because the mean of its divisors is an integer number (1085687625).

Almost surely, 2^4340709521 is an apocalyptic number.

It is an amenable number.

4340709521 is a deficient number, since it is larger than the sum of its proper divisors (2040979).

4340709521 is a wasteful number, since it uses less digits than its factorization.

4340709521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040978.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 4340709521 is about 65884.0612060307. The cubic root of 4340709521 is about 1631.2489356560.

Adding to 4340709521 its reverse (1259070434), we get a palindrome (5599779955).

The spelling of 4340709521 in words is "four billion, three hundred forty million, seven hundred nine thousand, five hundred twenty-one".