3438493891 has 4 divisors (see below), whose sum is σ = 3929707312. Its totient is φ = 2947280472.

The previous prime is 3438493889. The next prime is 3438493901. The reversal of 3438493891 is 1983948343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1983948343 = 13 ⋅152611411.

It is a cyclic number.

It is not a de Polignac number, because 3438493891 - 2¹ = 3438493889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3438493841) 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, 245606700 + ... + 245606713.

It is an arithmetic number, because the mean of its divisors is an integer number (982426828).

Almost surely, 2^3438493891 is an apocalyptic number.

3438493891 is a deficient number, since it is larger than the sum of its proper divisors (491213421).

3438493891 is an equidigital number, since it uses as much as digits as its factorization.

3438493891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491213420.

The product of its digits is 2239488, while the sum is 52.

The square root of 3438493891 is about 58638.6723161430. The cubic root of 3438493891 is about 1509.3481230769.

The spelling of 3438493891 in words is "three billion, four hundred thirty-eight million, four hundred ninety-three thousand, eight hundred ninety-one".