3409878389 has 4 divisors (see below), whose sum is σ = 3409996524. Its totient is φ = 3409760256.

The previous prime is 3409878379. The next prime is 3409878397. The reversal of 3409878389 is 9838789043.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9838789043 = 20849 ⋅471907.

It can be written as a sum of positive squares in 2 ways, for example, as 2012240164 + 1397638225 = 44858^2 + 37385^2 .

It is a cyclic number.

It is not a de Polignac number, because 3409878389 - 2²⁸ = 3141442933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3409878359) 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, 16199 + ... + 84155.

It is an arithmetic number, because the mean of its divisors is an integer number (852499131).

Almost surely, 2^3409878389 is an apocalyptic number.

It is an amenable number.

3409878389 is a deficient number, since it is larger than the sum of its proper divisors (118135).

3409878389 is an equidigital number, since it uses as much as digits as its factorization.

3409878389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118134.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The square root of 3409878389 is about 58394.1639977832. The cubic root of 3409878389 is about 1505.1494704805.

The spelling of 3409878389 in words is "three billion, four hundred nine million, eight hundred seventy-eight thousand, three hundred eighty-nine".