3659647349 has 4 divisors (see below), whose sum is σ = 3663137100. Its totient is φ = 3656157600.

The previous prime is 3659647301. The next prime is 3659647379. The reversal of 3659647349 is 9437469563.

3659647349 is digitally balanced in base 2, 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: 9437469563 = 883 ⋅10687961.

It can be written as a sum of positive squares in 2 ways, for example, as 3361912324 + 297735025 = 57982^2 + 17255^2 .

It is a cyclic number.

It is not a de Polignac number, because 3659647349 - 2²⁰ = 3658598773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3659647294 and 3659647303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3659647379) 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, 1743302 + ... + 1745399.

It is an arithmetic number, because the mean of its divisors is an integer number (915784275).

Almost surely, 2^3659647349 is an apocalyptic number.

It is an amenable number.

3659647349 is a deficient number, since it is larger than the sum of its proper divisors (3489751).

3659647349 is a wasteful number, since it uses less digits than its factorization.

3659647349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489750.

The product of its digits is 14696640, while the sum is 56.

The square root of 3659647349 is about 60495.0192081960. The cubic root of 3659647349 is about 1541.0370466117.

The spelling of 3659647349 in words is "three billion, six hundred fifty-nine million, six hundred forty-seven thousand, three hundred forty-nine".