3443645639 has 4 divisors (see below), whose sum is σ = 3935595024. Its totient is φ = 2951696256.

The previous prime is 3443645593. The next prime is 3443645657. The reversal of 3443645639 is 9365463443.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3443645639 - 2²⁸ = 3175210183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3443645593 and 3443645602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3443645839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245974682 + ... + 245974695.

It is an arithmetic number, because the mean of its divisors is an integer number (983898756).

Almost surely, 2^3443645639 is an apocalyptic number.

3443645639 is a deficient number, since it is larger than the sum of its proper divisors (491949385).

3443645639 is an equidigital number, since it uses as much as digits as its factorization.

3443645639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491949384.

The product of its digits is 2799360, while the sum is 47.

The square root of 3443645639 is about 58682.5837791759. The cubic root of 3443645639 is about 1510.1015441266.

The spelling of 3443645639 in words is "three billion, four hundred forty-three million, six hundred forty-five thousand, six hundred thirty-nine".