3421721743 has 4 divisors (see below), whose sum is σ = 3732787368. Its totient is φ = 3110656120.

The previous prime is 3421721713. The next prime is 3421721783. The reversal of 3421721743 is 3471271243.

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

It is not a de Polignac number, because 3421721743 - 2¹³ = 3421713551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3421721699 and 3421721708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3421721713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155532796 + ... + 155532817.

It is an arithmetic number, because the mean of its divisors is an integer number (933196842).

Almost surely, 2^3421721743 is an apocalyptic number.

3421721743 is a deficient number, since it is larger than the sum of its proper divisors (311065625).

3421721743 is a wasteful number, since it uses less digits than its factorization.

3421721743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311065624.

The product of its digits is 28224, while the sum is 34.

The square root of 3421721743 is about 58495.4848086585. The cubic root of 3421721743 is about 1506.8900427864.

Adding to 3421721743 its reverse (3471271243), we get a palindrome (6892992986).

The spelling of 3421721743 in words is "three billion, four hundred twenty-one million, seven hundred twenty-one thousand, seven hundred forty-three".